I have a nvidia 8600gt as a secondary gpu and a hd 5870 2g eye6 for a primary. I ran 3dmark 2011 and barely crawled passed the 1st test on performace settings at a max of 20 fps. I shutoff ati programs and that raised me 1-2 fps. Then I disabled the nvid all together and the fps jumped to 35-37 fps. I've never seen any proof that the nvid card has ever done anything. Even though it is connected to a seperate monitor, Ill watch a movie on it and all of the mem usage or gpu load monitors show 0. Did I do something wrong, did nvidia's new physx slip up somehow craplink the 8600 to the 5870. I also thought maybe the 2nd card was eating alot of cpu power but ive an i7 a hair over 4ghz, i'de think I'de have plenty of power. I realize my 5870 sucks with teselation (sp?) but an almost 20fps from disabling the nvid really makes me wonder if the nvid is leeching my 5870 somehow. I know the ati Nvid hybrid deal is getting old but I would really appriciate some help or input.