I just updated my computer from 512 mb of ram to 2 gigs of Corsair. My computer seems to be running faster, but I ran 3DMark05 and my scores were actually worse than before. My mobo, a Biostar P4TSV, has 4 slots. Originally, it came with two 256's in slots 1 and 3, so to upgrade my memory, I just took those out and replaced them with 1 gig's. The slot colors matched up, so i figured I was alright :stickout: Guess I was wrong. Did I do anything wrong? Is there something I don't know about? And, while I have a thread going, once I get this worked out would it be possible to put my 256's in slots 2 and 4 to further increase the memory?