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.

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1 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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