Do you have onboard graphics? If you do, it might be using the system memory as video memory in which case you would need to play around with the BIOS.
maybe the ram isint compatible with the system. i know from experience i had an old stick of pc-133 128mb in a pc-100 only slot and it told me i only had 64mb
it wasnt just Windows, even the BIOS is having the same issue. The RAM sticks really match. The original one was an InfiniteRAM DD266 and it was also exactly the one I added. Do i need to update my BIOS software?