Motherboard: Gigabyte GA7VRXP, I may have updated (flashed) the BIOS once, too long ago to remember really. RAM is PC-2700 and is made by NCP. I had 512 mb before (PC-2700), bought two sticks of 1 gig each, inserted them, the BIOS did not correctly show the amount of RAM, it said something funny like 64 mb. In WinXP I could read I have 1.5 gb. So I thought, a faulty slot maybe? Took the 512mb out, Windows show 1 gb. Took one of the 1 gb sticks out - Windows says 512 mb. So, 1 gb sticks work as 512 mb. Any suggestions? I looked in BIOS setup and I don't think it says anything like 'enable more than 512mb per slot'.