u know what beedubaya, if u can barrow a 6800 from someone, or get a hold of one somehow just to test it in your system... id be curiouse to see if that would actually make the difference, and rule out if its maybe something else thats rong inside, not the gfx card?
u'd prolly actualy be more curiouse to find out then i, but if u have the means to try it, please inform us of resaults.