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22 KiB
Markdown
699 lines
22 KiB
Markdown
Translating
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Linux Basics: How To Find Maximum Supported RAM By Your System
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================================================================================
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Mostly, you will find maximum supported RAM by your system from the BIOS, Product catalog, or manuals. Here is the simple, yet useful trick, to find out maximum supported RAM using Dmidecode without opening the system chassis or referring the BIOS, product catalogs.
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### What is Dmidecode? ###
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As you may know, **Dmidecode** is a tool for dumping a computer’s DMI (some say SMBIOS) table contents in a human-readable format. This table contains a description of the system’s hardware components, as well as other useful pieces of information such as serial numbers and BIOS revision. Using Dmidecode, you can retrieve this information without having to probe for the actual hardware.
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### Find out the maximum RAM supported by your system ###
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Make sure you have installed dmidecode on your system. I think it will be automatically installed while installing your OS, but I am not sure though.
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**On Deb based system:**
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sudo apt-get install dmidecode
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**On RPM based system:**
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sudo yum install dmidecode
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**On SUSE/openSUSE:**
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sudo zypper in dmidecode
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Well, we installed dmidecode. Let us find out the maximum RAM supported. To do that, enter the following command:
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sudo dmidecode -t 16
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**Sample output:**
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# dmidecode 2.12
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SMBIOS 2.6 present.
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Handle 0x0014, DMI type 16, 15 bytes
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Physical Memory Array
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Location: System Board Or Motherboard
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Use: System Memory
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Error Correction Type: None
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Maximum Capacity: 16 GB
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Error Information Handle: Not Provided
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Number Of Devices: 2
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As you see in the above output, my system will support RAM upto 16GB, and it has two RAM slots. Pretty easy, isn’t it?
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Well, let us find out the currently installed RAM details.
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sudo dmidecode -t 17
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**Sample output:**
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# dmidecode 2.12
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SMBIOS 2.6 present.
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Handle 0x0017, DMI type 17, 28 bytes
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Memory Device
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Array Handle: 0x0014
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Error Information Handle: 0x0000
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Total Width: Unknown
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Data Width: Unknown
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Size: No Module Installed
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Form Factor: DIMM
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Set: None
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Locator: DIMM_B
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Bank Locator: BANK 2
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Type: Unknown
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Type Detail: None
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Speed: Unknown
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Manufacturer: Not Specified
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Serial Number: Not Specified
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Asset Tag: Not Specified
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Part Number: Not Specified
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Rank: Unknown
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Handle 0x0015, DMI type 17, 28 bytes
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Memory Device
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Array Handle: 0x0014
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Error Information Handle: 0x0000
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Total Width: 64 bits
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Data Width: 64 bits
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Size: 4096 MB
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Form Factor: SODIMM
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Set: None
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Locator: DIMM_A
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Bank Locator: BANK 0
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Type: DDR3
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Type Detail: Synchronous
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Speed: 1067 MHz
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Manufacturer: 014F
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Serial Number: 00092AF2
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Asset Tag: 54114000
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Part Number: JM1066KSN-4G
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Rank: Unknown
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As per the above output, I have installed one RAM in DIMM slot 1. The RAM size is **4GB**, and it’s type and speed is **DDR3** and **1067 MHz** respectively.
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Also, we can have the complete RAM details using the following commands.
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sudo dmidecode -t memory
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sudo dmidecode -t memory | less
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sudo dmidecode -t memory | more
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**Sample output:**
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# dmidecode 2.12
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SMBIOS 2.6 present.
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Handle 0x0014, DMI type 16, 15 bytes
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Physical Memory Array
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Location: System Board Or Motherboard
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Use: System Memory
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Error Correction Type: None
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Maximum Capacity: 16 GB
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Error Information Handle: Not Provided
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Number Of Devices: 2
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Handle 0x0017, DMI type 17, 28 bytes
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Memory Device
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Array Handle: 0x0014
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Error Information Handle: 0x0000
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Total Width: Unknown
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Data Width: Unknown
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Size: No Module Installed
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Form Factor: DIMM
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Set: None
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Locator: DIMM_B
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Bank Locator: BANK 2
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Type: Unknown
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Type Detail: None
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Speed: Unknown
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Manufacturer: Not Specified
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Serial Number: Not Specified
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Asset Tag: Not Specified
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Part Number: Not Specified
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Rank: Unknown
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Handle 0x0015, DMI type 17, 28 bytes
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Memory Device
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Array Handle: 0x0014
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Error Information Handle: 0x0000
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Total Width: 64 bits
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Data Width: 64 bits
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Size: 4096 MB
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Form Factor: SODIMM
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Set: None
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Locator: DIMM_A
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Bank Locator: BANK 0
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Type: DDR3
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Type Detail: Synchronous
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Speed: 1067 MHz
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Manufacturer: 014F
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Serial Number: 00092AF2
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Asset Tag: 54114000
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Part Number: JM1066KSN-4G
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Rank: Unknown
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Curious to know the complete system details such as Motherboard, Memory, Bios etc? Well, enter the following command to get all details.
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sudo dmidecode
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**Sample output:**
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# dmidecode 2.12
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SMBIOS 2.6 present.
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48 structures occupying 2173 bytes.
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Table at 0x000EB840.
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Handle 0xDA00, DMI type 218, 251 bytes
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OEM-specific Type
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Header and Data:
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DA FB 00 DA B2 00 0D 5F 0F 37 40 7D 00 00 00 00
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00 7E 00 01 00 00 00 DC 01 00 80 02 00 DD 01 00
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80 03 00 75 01 01 80 01 00 76 01 02 80 01 00 2D
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01 03 80 01 00 2E 01 03 80 00 00 81 01 07 80 00
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00 82 01 07 80 01 00 83 01 08 80 00 00 84 01 08
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80 01 00 85 01 06 80 00 00 86 01 06 80 01 00 58
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02 05 80 00 00 57 02 05 80 01 00 9C 00 02 00 01
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00 9B 00 02 00 00 00 8A 01 03 00 01 00 89 01 03
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00 00 00 7F 01 04 00 00 00 80 01 04 00 01 00 53
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01 05 00 00 00 52 01 05 00 01 00 7B 01 06 00 00
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00 7C 01 06 00 01 00 94 01 07 00 00 00 93 01 07
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00 01 00 7D 00 08 00 00 00 2D 00 09 00 01 00 2E
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00 09 00 00 00 6E 00 0A 00 00 00 95 00 0B 00 01
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00 96 00 0B 00 00 00 2F 02 0C 00 01 00 30 02 0C
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00 00 00 50 02 0D 00 00 00 51 02 0D 00 01 00 52
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02 0D 00 02 00 FF FF 00 00 00 00
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Handle 0xDA01, DMI type 218, 59 bytes
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OEM-specific Type
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Header and Data:
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DA 3B 01 DA B2 00 0D 5F 0F 37 40 53 02 0D 00 03
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00 54 02 0D 00 04 00 56 02 0D 00 05 00 4B 01 0E
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00 01 00 4A 01 0E 00 00 00 EA 00 0F 00 01 00 EB
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00 0F 00 00 00 FF FF 00 00 00 00
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Handle 0x0004, DMI type 4, 42 bytes
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Processor Information
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Socket Designation: CPU 1
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Type: Central Processor
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Family: Core i3
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Manufacturer: Intel
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ID: A7 06 03 01 FF FB AB BE
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Signature: Type 0, Family 6, Model 42, Stepping 7
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Flags:
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FPU (Floating-point unit on-chip)
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VME (Virtual mode extension)
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DE (Debugging extension)
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PSE (Page size extension)
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TSC (Time stamp counter)
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MSR (Model specific registers)
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PAE (Physical address extension)
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MCE (Machine check exception)
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CX8 (CMPXCHG8 instruction supported)
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APIC (On-chip APIC hardware supported)
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SEP (Fast system call)
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MTRR (Memory type range registers)
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PGE (Page global enable)
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MCA (Machine check architecture)
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CMOV (Conditional move instruction supported)
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PAT (Page attribute table)
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PSE-36 (36-bit page size extension)
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CLFSH (CLFLUSH instruction supported)
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DS (Debug store)
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ACPI (ACPI supported)
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MMX (MMX technology supported)
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FXSR (FXSAVE and FXSTOR instructions supported)
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SSE (Streaming SIMD extensions)
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SSE2 (Streaming SIMD extensions 2)
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SS (Self-snoop)
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HTT (Multi-threading)
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TM (Thermal monitor supported)
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PBE (Pending break enabled)
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Version: Intel(R) Core(TM) i3-2350M CPU @ 2.30GHz
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Voltage: 1.1 V
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External Clock: 100 MHz
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Max Speed: 2300 MHz
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Current Speed: 2300 MHz
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Status: Populated, Enabled
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Upgrade: Other
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L1 Cache Handle: 0x0005
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L2 Cache Handle: 0x0006
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L3 Cache Handle: 0x0007
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Serial Number: To Be Filled By O.E.M.
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Asset Tag: To Be Filled By O.E.M.
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Part Number: To Be Filled By O.E.M.
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Core Count: 2
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Core Enabled: 1
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Thread Count: 2
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Characteristics:
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64-bit capable
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Handle 0x0005, DMI type 7, 19 bytes
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Cache Information
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Socket Designation: L1-Cache
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Configuration: Enabled, Not Socketed, Level 1
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Operational Mode: Write Back
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Location: Internal
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Installed Size: 64 kB
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Maximum Size: 64 kB
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Supported SRAM Types:
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Other
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Installed SRAM Type: Other
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Speed: Unknown
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Error Correction Type: None
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System Type: Unified
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Associativity: 8-way Set-associative
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Handle 0x0006, DMI type 7, 19 bytes
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Cache Information
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Socket Designation: L2-Cache
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Configuration: Enabled, Not Socketed, Level 2
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Operational Mode: Varies With Memory Address
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Location: Internal
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Installed Size: 512 kB
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Maximum Size: 512 kB
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Supported SRAM Types:
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Other
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Installed SRAM Type: Other
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Speed: Unknown
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Error Correction Type: None
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System Type: Unified
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Associativity: 8-way Set-associative
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Handle 0x0007, DMI type 7, 19 bytes
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Cache Information
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Socket Designation: L3-Cache
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Configuration: Enabled, Not Socketed, Level 3
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Operational Mode: Varies With Memory Address
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Location: Internal
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Installed Size: 3072 kB
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Maximum Size: 3072 kB
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Supported SRAM Types:
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Other
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Installed SRAM Type: Other
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Speed: Unknown
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Error Correction Type: None
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System Type: Unified
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Associativity: Other
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Handle 0x0008, DMI type 8, 9 bytes
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Port Connector Information
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Internal Reference Designator: J1A1
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Internal Connector Type: None
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External Reference Designator: PS2Mouse
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External Connector Type: PS/2
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Port Type: Mouse Port
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Handle 0x0009, DMI type 8, 9 bytes
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Port Connector Information
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Internal Reference Designator: J1A1
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Internal Connector Type: None
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External Reference Designator: Keyboard
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External Connector Type: PS/2
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Port Type: Keyboard Port
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Handle 0x000A, DMI type 8, 9 bytes
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Port Connector Information
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Internal Reference Designator: J2A2B
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Internal Connector Type: None
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External Reference Designator: Video
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External Connector Type: DB-15 female
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Port Type: Video Port
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Handle 0x000B, DMI type 8, 9 bytes
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Port Connector Information
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Internal Reference Designator: J3A1
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Internal Connector Type: None
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External Reference Designator: USB1
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External Connector Type: Access Bus (USB)
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Port Type: USB
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Handle 0x000C, DMI type 8, 9 bytes
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Port Connector Information
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Internal Reference Designator: J3A1
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Internal Connector Type: None
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External Reference Designator: USB2
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External Connector Type: Access Bus (USB)
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Port Type: USB
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Handle 0x000D, DMI type 8, 9 bytes
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Port Connector Information
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Internal Reference Designator: J3A1
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Internal Connector Type: None
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External Reference Designator: USB3
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External Connector Type: Access Bus (USB)
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Port Type: USB
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Handle 0x000E, DMI type 8, 9 bytes
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Port Connector Information
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Internal Reference Designator: J5A1
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Internal Connector Type: None
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External Reference Designator: LAN
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External Connector Type: RJ-45
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Port Type: Network Port
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Handle 0x000F, DMI type 9, 17 bytes
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System Slot Information
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Designation: J6B2
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Type: x16 PCI Express
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Current Usage: In Use
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Length: Long
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ID: 0
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Characteristics:
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3.3 V is provided
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Opening is shared
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PME signal is supported
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Bus Address: 0000:00:01.0
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Handle 0x0010, DMI type 9, 17 bytes
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System Slot Information
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Designation: J6B1
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Type: x1 PCI Express
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Current Usage: In Use
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Length: Short
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ID: 1
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Characteristics:
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3.3 V is provided
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Opening is shared
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PME signal is supported
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Bus Address: 0000:00:1c.3
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Handle 0x0012, DMI type 11, 5 bytes
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OEM Strings
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String 1: Dell System
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String 2: 5[0003]
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String 3: 13[P18F]
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Handle 0x0013, DMI type 12, 5 bytes
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System Configuration Options
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Option 1: To Be Filled By O.E.M.
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Handle 0x001C, DMI type 21, 7 bytes
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Built-in Pointing Device
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Type: Touch Pad
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Interface: Bus Mouse
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Buttons: 2
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Handle 0x001D, DMI type 22, 26 bytes
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Portable Battery
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Location: Sys. Battery Bay
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Manufacturer: Sanyo
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Serial Number: 5390
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Name: DELL 4YRJH22
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Chemistry: Lithium Ion
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Design Capacity: 45000 mWh
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Design Voltage: 10800 mV
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SBDS Version: 1.0
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Maximum Error: 2%
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SBDS Manufacture Date: 2012-02-28
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OEM-specific Information: 0x00000001
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Handle 0x001E, DMI type 32, 20 bytes
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System Boot Information
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Status: No errors detected
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Handle 0x0020, DMI type 27, 12 bytes
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Cooling Device
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Type: Fan
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Status: OK
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OEM-specific Information: 0x00000000
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Handle 0x0021, DMI type 28, 20 bytes
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Temperature Probe
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Description: CPU Internal Temperature
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Location: Processor
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Status: OK
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Maximum Value: 127.0 deg C
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Minimum Value: 0.0 deg C
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Resolution: 1.000 deg C
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Tolerance: 0.5 deg C
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Accuracy: Unknown
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OEM-specific Information: 0x00000000
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Handle 0xB000, DMI type 176, 5 bytes
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OEM-specific Type
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Header and Data:
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B0 05 00 B0 00
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Handle 0xB100, DMI type 177, 12 bytes
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OEM-specific Type
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Header and Data:
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B1 0C 00 B1 1A 0E 00 00 00 00 00 00
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Handle 0x0025, DMI type 209, 12 bytes
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OEM-specific Type
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Header and Data:
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D1 0C 25 00 00 00 00 03 05 01 00 03
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Handle 0x0026, DMI type 210, 12 bytes
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OEM-specific Type
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Header and Data:
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D2 0C 26 00 00 00 00 03 05 20 01 03
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Handle 0x0027, DMI type 211, 13 bytes
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OEM-specific Type
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Header and Data:
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D3 0D 27 00 01 00 00 00 00 02 03 04 04
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Strings:
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Front
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Handle 0x0028, DMI type 212, 57 bytes
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OEM-specific Type
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Header and Data:
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D4 39 28 00 70 00 71 00 01 49 50 48 9C 00 49 FC
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01 9B 00 49 FC 00 7F 01 4A FB 04 80 01 4A FB 00
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53 01 4A F7 08 52 01 4A F7 08 7B 01 4A EF 10 7C
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01 4A EF 10 FF FF 00 00 00
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Handle 0x002A, DMI type 217, 8 bytes
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OEM-specific Type
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Header and Data:
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D9 08 2A 00 01 02 00 00
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Strings:
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Handle 0x002B, DMI type 219, 11 bytes
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OEM-specific Type
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Header and Data:
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DB 0B 2B 00 00 01 02 03 00 04 05
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Strings:
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Handle 0x002C, DMI type 220, 22 bytes
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OEM-specific Type
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Header and Data:
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DC 16 2C 00 01 F0 00 00 02 F0 00 00 00 00 03 F0
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04 F0 00 00 00 00
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Handle 0x002D, DMI type 221, 19 bytes
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OEM-specific Type
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Header and Data:
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DD 13 2D 00 00 00 00 00 00 03 00 00 00 00 00 00
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00 00 00
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Handle 0x002E, DMI type 222, 16 bytes
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OEM-specific Type
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Header and Data:
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DE 10 2E 00 01 08 FF FF 00 00 00 00 00 00 00 00
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Handle 0x0014, DMI type 16, 15 bytes
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Physical Memory Array
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Location: System Board Or Motherboard
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Use: System Memory
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Error Correction Type: None
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Maximum Capacity: 16 GB
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Error Information Handle: Not Provided
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Number Of Devices: 2
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Handle 0x0016, DMI type 20, 19 bytes
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Memory Device Mapped Address
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Starting Address: 0x00000000000
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Ending Address: 0x000FFFFFFFF
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Range Size: 4 GB
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Physical Device Handle: 0x0015
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Memory Array Mapped Address Handle: 0x0018
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Partition Row Position: 1
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Interleave Position: 1
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Interleaved Data Depth: 1
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Handle 0x0017, DMI type 17, 28 bytes
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Memory Device
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Array Handle: 0x0014
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Error Information Handle: 0x0000
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Total Width: Unknown
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Data Width: Unknown
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Size: No Module Installed
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Form Factor: DIMM
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Set: None
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Locator: DIMM_B
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Bank Locator: BANK 2
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Type: Unknown
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Type Detail: None
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Speed: Unknown
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Manufacturer: Not Specified
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Serial Number: Not Specified
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Asset Tag: Not Specified
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Part Number: Not Specified
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Rank: Unknown
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Handle 0x0018, DMI type 19, 15 bytes
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Memory Array Mapped Address
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Starting Address: 0x00000000000
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Ending Address: 0x000FFFFFFFF
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Range Size: 4 GB
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Physical Array Handle: 0x0014
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Partition Width: 2
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Handle 0x002F, DMI type 13, 22 bytes
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BIOS Language Information
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Language Description Format: Abbreviated
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Installable Languages: 1
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eng
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Currently Installed Language: eng
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Handle 0x0030, DMI type 131, 64 bytes
|
||
OEM-specific Type
|
||
Header and Data:
|
||
83 40 30 00 31 00 00 00 00 00 00 00 00 00 00 00
|
||
F8 00 4B 1C FF FF FF FF 01 00 00 00 00 00 07 00
|
||
AD 04 04 00 00 00 00 00 C8 00 FF FF 00 00 00 00
|
||
00 00 00 00 32 00 00 00 76 50 72 6F 00 00 00 00
|
||
|
||
Handle 0x0029, DMI type 216, 9 bytes
|
||
OEM-specific Type
|
||
Header and Data:
|
||
D8 09 29 00 01 02 01 00 00
|
||
Strings:
|
||
INTEL
|
||
0000
|
||
|
||
Handle 0x0000, DMI type 0, 24 bytes
|
||
BIOS Information
|
||
Vendor: Dell Inc.
|
||
Version: A05
|
||
Release Date: 08/03/2012
|
||
Address: 0xF0000
|
||
Runtime Size: 64 kB
|
||
ROM Size: 2048 kB
|
||
Characteristics:
|
||
MCA is supported
|
||
PCI is supported
|
||
BIOS is upgradeable
|
||
BIOS shadowing is allowed
|
||
ESCD support is available
|
||
Boot from CD is supported
|
||
Selectable boot is supported
|
||
BIOS ROM is socketed
|
||
EDD is supported
|
||
5.25"/1.2 MB floppy services are supported (int 13h)
|
||
3.5"/720 kB floppy services are supported (int 13h)
|
||
3.5"/2.88 MB floppy services are supported (int 13h)
|
||
Print screen service is supported (int 5h)
|
||
8042 keyboard services are supported (int 9h)
|
||
Serial services are supported (int 14h)
|
||
Printer services are supported (int 17h)
|
||
CGA/mono video services are supported (int 10h)
|
||
ACPI is supported
|
||
USB legacy is supported
|
||
ATAPI Zip drive boot is supported
|
||
BIOS boot specification is supported
|
||
Targeted content distribution is supported
|
||
BIOS Revision: 0.5
|
||
Firmware Revision: 0.5
|
||
|
||
Handle 0x0002, DMI type 2, 15 bytes
|
||
Base Board Information
|
||
Manufacturer: Dell Inc.
|
||
Product Name: 01HXXJ
|
||
Version: A05
|
||
Serial Number: .JSQ7PA1.CN7117623M00J2.
|
||
Asset Tag: Not Specified
|
||
Features:
|
||
Board is a hosting board
|
||
Board is replaceable
|
||
Location In Chassis: To Be Filled By O.E.M.
|
||
Chassis Handle: 0x0003
|
||
Type: Motherboard
|
||
Contained Object Handles: 0
|
||
|
||
Handle 0x0003, DMI type 3, 21 bytes
|
||
Chassis Information
|
||
Manufacturer: Dell Inc.
|
||
Type: Portable
|
||
Lock: Not Present
|
||
Version: Not Specified
|
||
Serial Number: JSR1
|
||
Asset Tag: Not Specified
|
||
Boot-up State: Safe
|
||
Power Supply State: Safe
|
||
Thermal State: Safe
|
||
Security Status: None
|
||
OEM Information: 0x00000000
|
||
Height: Unspecified
|
||
Number Of Power Cords: 1
|
||
Contained Elements: 0
|
||
|
||
Handle 0x0001, DMI type 1, 27 bytes
|
||
System Information
|
||
Manufacturer: Dell Inc.
|
||
Product Name: Inspiron N5050
|
||
Version: Not Specified
|
||
Serial Number: JSR1
|
||
UUID: 4C4C4544-0053-5110-8029-CAC05241
|
||
Wake-up Type: Power Switch
|
||
SKU Number: To be filled by O.E.M.
|
||
Family:
|
||
|
||
Handle 0x0024, DMI type 208, 12 bytes
|
||
OEM-specific Type
|
||
Header and Data:
|
||
D0 0C 24 00 02 05 FE 00 04 05 01 02
|
||
Strings:
|
||
20120323
|
||
20120323
|
||
|
||
Handle 0x0011, DMI type 10, 6 bytes
|
||
On Board Device Information
|
||
Type: Video
|
||
Status: Enabled
|
||
Description: Mobile Intel SandyBridge HD Graphics
|
||
|
||
Handle 0x0015, DMI type 17, 28 bytes
|
||
Memory Device
|
||
Array Handle: 0x0014
|
||
Error Information Handle: 0x0000
|
||
Total Width: 64 bits
|
||
Data Width: 64 bits
|
||
Size: 4096 MB
|
||
Form Factor: SODIMM
|
||
Set: None
|
||
Locator: DIMM_A
|
||
Bank Locator: BANK 0
|
||
Type: DDR3
|
||
Type Detail: Synchronous
|
||
Speed: 1067 MHz
|
||
Manufacturer: 014F
|
||
Serial Number: 0009F2
|
||
Asset Tag: 54114000
|
||
Part Number: JM1066-4G
|
||
Rank: Unknown
|
||
|
||
Handle 0x0031, DMI type 127, 4 bytes
|
||
End Of Table
|
||
|
||
That’s it. Happy weekend. Stay happy!
|
||
|
||
--------------------------------------------------------------------------------
|
||
|
||
via: https://www.unixmen.com/linux-basics-how-to-find-maximum-supported-ram-by-your-system/
|
||
|
||
作者：[SK][a]
|
||
译者：[译者ID](https://github.com/译者ID)
|
||
校对：[校对者ID](https://github.com/校对者ID)
|
||
|
||
本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创翻译，[Linux中国](http://linux.cn/) 荣誉推出
|
||
|
||
[a]:https://www.unixmen.com/author/sk/
|