A few weeks ago slickdeals had a deal on crucial memory from new egg so I bought two 512mb of crucial pc3200 memory to add to my 512mb of pc2700 memory. The only problem I'm having is when playing Counter Strike source I get a blue screen of death. I can play for a few hours and then it crashes. The error message says it's a video card problem but it only started happening after I upgraded the memory. Could it really be the video card or is it the memory? What do I have to do to isolate the problem? My video card is an old geforce4 4200ti so I know it's on it's last legs so would just buying a new video card be a good idea?