Determining the type of RAM

Question

I'm trying to determine what type of RAM a computer has (whether it's DDR2 or DDR3).

I've tried several commands:

• sudo lshw -short -C memory outputs this:

  H/W path        Device      Class       Description
  ===================================================
  /0/2                        memory      1980MiB System memory
  

• sudo dmidecode -t memory outputs this:

  # dmidecode 2.12
  # No SMBIOS nor DMI entry point found, sorry.
  

• sudo dmidecode | grep -A 15 Memory outputs nothing.

• I also tried looking in hardinfo under "Devices>Memory" but I can't find out the type.

Edit:

• sudo lshw -C memory outputs this only:

  *-memory                
       description: System memory
       physical id: 2
       size: 1980MiB
  

Answer 1

Use sudo lshw -c memory without the -short option.

Here's an example output:

$ sudo lshw -c memory
  *-memory
       description: System Memory
       physical id: c
       slot: System board or motherboard
       size: 12GiB
     *-bank:0
          description: SODIMM DDR3 Synchronous 1600 MHz (0,6 ns)
          product: ACR16D3LS1KNG/8G
          vendor: Kingston
          physical id: 0
          serial: 16392411
          slot: ChannelA-DIMM0
          size: 8GiB
          width: 64 bits
          clock: 1600MHz (0.6ns)
     [...shortened output...]
  *-memory UNCLAIMED
       [...shortened output...]

You see the RAM type in the description field of every memory bank, like here:

description: SODIMM DDR3 Synchronous 1600 MHz (0,6 ns)