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qbi
Asked: 2010-12-22 03:18:45 +0800 CST

How can I find out what RAM a computer system has? [duplicate]

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I'm looking for a way to find out what kind of RAM a system has (clocking speed, DDR-X etc.). Is there a specific command for that? I'm only aware of free or lspci which don't offer those things.

command-line hardware ram

1 Answers

  1. Best Answer

    Yes there is:

    sudo lshw -short -C memory

    It will output something like this:

    H/W path      Class       Description
====================================================
/0/0          memory      106KiB BIOS
/0/4/5        memory      64KiB L1 cache
/0/4/6        memory      1MiB L2 cache
/0/d          memory      3GiB System Memory
/0/d/0        memory      1GiB SODIMM DDR2 Synchronous 667 MHz (1.5 ns)
/0/d/1        memory      2GiB SODIMM DDR2 Synchronous 667 MHz (1.5 ns)

    You may also want to take a look at the full output of sudo lshw -short or even sudo lshw to get much more information about your hardware.

    My thanks to jet and CYREX for pointing out a much better method: 

    sudo dmidecode -t memory

    Which outputs something like this:

    ...

Handle 0x000F, DMI type 17, 27 bytes
Memory Device
    Array Handle: 0x000D
    Error Information Handle: No Error
    Total Width: 64 bits
    Data Width: 64 bits
    Size: 2048 MB
    Form Factor: SODIMM
    Set: 1
    Locator: M2
    Bank Locator: Bank 1
    Type: DDR2
    Type Detail: Synchronous
    Speed: 667 MHz (1.5 ns)
    Manufacturer: Mfg 1
    Serial Number: 1234-B1
    Asset Tag: Not Specified
    Part Number: SODIMM001

    ...

    This method is based on the Desktop Management Interface:

    From 1999, Microsoft required OEMs and BIOS vendors to support the DMI interface/data-set in order to have Microsoft certification.(1)

    It should therefore work pretty reliably.

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