konrad@konrad:~$ sudo lshw -short -C memory
H/W path                   Device     Class       Description
=============================================================
/0/0                                  memory      128KiB BIOS
/0/4/8                                memory      64KiB L1 cache
/0/4/9                                memory      1MiB L2 cache
/0/19                                 memory      2GiB System Memory
/0/19/0                               memory      2GiB DIMM 800 MHz (1,2 ns)
/0/19/1                               memory      DIMM [empty]