I just bought some oem pc-2700 with samsung chips on it. Ok i installed it and went into the bios and it recognized that I now have 512mb of ram instead of 256 which is right. But now when windows xp gets ready to load and just before the widows xp logo comes up i get this error "system32\drivers\pci.sys". This is with the Asus P4B533 MB. This ram wouldnt work in my p4s333 board. Any suggestions before I take it back to the store? I read the asus manuall and followed every configuration they said. If I try the ram in a slot by itself all I get is a black screen, and it wont boot.