I currently have a XFX 6600 GT. I am one of the lucky ones who have had no issues with the card. I am considering upgrading to a Leadtek 6800GT and moving the 6600GT to my son's Athlon 2200 with 512MB PC2700 RAM. Good move? How much will my Athlon 64 bottleneck the 6800GT? With the Athlon 2200 seriously bottleneck the 6600GT? By the way, if necessary I can upgrade the Athlon 2200 to 1 gig of RAM. I have lurked here for years and I have seen lots of good advice. Thanks in advance for your opinions.