Report the used RAM slots in a Linux machine

  • lshw ( is a terminal program that shows plenty of information about your computer system, including specifics of the memory. This is the sort of information it gives.
description: System Memory
physical id: 40
slot: System board or motherboard
size: 4GB
description: DIMM SDRAM
Synchronous 800 MHz (1.2 ns)
product: PartNum0
vendor: Manufacturer0
physical id: 0
serial: SerNum0
slot: DIMM0
size: 1GB
width: 64 bits
clock: 800MHz (1.2ns)

For a graphical alternative, try HardInfo ( This shows a different selection of information about your computer. Between the two, they should tell you all they need Incidentally, the output from these programs can be extremely useful to us when we're trying to answer your questions.