This is my first post. umm, here's the problem. I have a 6 year old gateway PC and a while back i got a 64mb ram chip. everything ran really well untill just a few weeks ago, i got two 256mb ram chips from a friends old computer. after putting them in my PC. It wouldn't boot up. so after removing them it ran fine but when i tried to put my old 64mb chip in it still wouldn't boot up. so now i'm back to the ram that came with my PC. any ides on why it won't boot up with the new ram? also I instaled a new hard drive and DVD drive on the same day. but those are both working fine. any advice would be much appecieted.