Yeah, tried a single flexible SLI bridge, and the hard one that attached to both bridges, no change.
Made no difference with Physx assigned as Auto, to the 2nd GPU or the CPU.
The couple programs i consistently test are unique heaven benchmark, and SWTOR - this game normally ran 60-100fps with 1 card - I see 4-5 fps in SLI!! ick...
Removed all the ati drivers - that was bad ...Heh! Rebooted, has no usb/ps2 active!! Had to do a Windows install disk start up repair and manually reload the usb drivers off a backup driver dvd I had made back in the day. Fortunately i had uncompressed them or i would have been screwed. Of Course, couldn't find my last restore point disk...funny how that works!
Burned a new one "just in case" !
A number of guys with Asus sabertooth 990fx i have come across with the same issue. I am the first Crosshair V board I have found so far, but the 2 aren't that different hardware-wise...
I have posted in several forums related to my hardware as well, and will keep trying, but it is looking more and more like an Nvidia issue, as there are a lot of folks with the same setup i have and 2 580GTX work just fine in SLI...
i appreciate the time you have taken for me!
<message edited by Karandar on Wednesday, April 18, 2012 10:30 PM>