I'd better have a look at what sort of memory DIMMs do I have installed on my netbook, which I have conveniently installed with Fedora 15.
Simply issue: dmidecode -t memory or dmidecode -t 17 (specifically on the memory module)
[shahmatd@beluga ~]$ sudo dmidecode --type 17
# dmidecode 2.11
SMBIOS 2.6 present.
Handle 0x000B, DMI type 17, 28 bytes
Memory Device
Array Handle: 0x000A
Error Information Handle: 0x000C
Total Width: 64 bits
Data Width: 64 bits
Size: 1024 MB
Form Factor: SODIMM
Set: None
Locator: DIMM1
Bank Locator: BANK 0
Type: DDR2
Type Detail: Synchronous
Speed: 667 MHz
Manufacturer: Hynix
Serial Number: 4784BE5200
Asset Tag: Unknown
Part Number: HMP112S6NFR8C-S6
Rank: Unknown