I would suspect that if there are known issues with the 9800gx2 then you may be onto something. I am running a similar setup, although not that powerful but the only difference is 32bit Vista and 8800GT(512mb).

No issues outside of major cities and a slight slowdown in shatt/ogrimmar. I am only running 4 toons atm , until my shaman group hits 23 , then will start running 5. All under 1 install of WoW.



Coilfang 13's Timbaa, Timbee, Timboo, Timbuu.........coming soon Paladin

Coilfang 70 Lock-Incarnat, 70 Mage-Pollypocket, 68 Hunter Muclesmague, 65 Shaman Hornsy.....coming soon 70 Druid