Try using wowmaximizer again instead of Keyclone's Maximizer; when I opened wow with maximizer via keyclone my comp lagged baaaaaaaaaaaaaaad. When I ran wows manually via desktop icon I run smooth as silk. I've mentioned this to him back when I first got it in Jan but I don't really know if it's an issue on his end or mine or if he can even do anything about it, but give it a shot :p

Try with a single 9800 too...never know what an sli/crossfire setup might do or they could be fighting over who gets to render what like spoiled kids, lol, and the sad part is I'm at least partially serious; Computers are very finicky, very strange things that NEVER follow logic in how they act. To solve issues like this you have to think outside the box even if it seems stupid or unlikely :p Oftentimes that unlikely bit is the most likely lol