I'm running ATItool .25 beta 12 with a sapphire x1800 XL. When it's running 585/585 timings I get keyboard lag when playing games such as World of Warcraft, Battlefield 2, and Dungeons & Dragons beta. For example, I'll be playing with no problems, then every so often, say when I'm moving forward then try to turn, I'll still be moving forward for about 1 second before it will respond to my turn command. It'll keep lagging for about 4-5 seconds then fix itself again. That probably occurs about every 5 minutes.