Thanks for that info, I know the machine has 1GB RAM in there, just wasn't sure if it was 1 x 1GB or 2 x 512MB.

cat /proc/mtrr gave me this info:

reg00: base=0x00000000 ( 0MB), size=1024MB: write-back, count=1
reg01: base=0xfc000000 (4032MB), size= 64MB: uncachable, count=1


So I guess I have a single 1GB stick in there.

Thanks again, and thanks for the advice on server choice I'll bear it in mind.

By the way, I think Dell desktops are ok, but severely limited if you want to upgrade the damn things.