Quote Originally Posted by yym789 View Post
I bought another GTX 570 (same brand) today.


wow.... I hate P8P67 pro bios ...........It may be bios problem.


Nothing difference within 2 cards and just can not SLI.... !!!!



I tested fine individual, just can not use in SLI.

Does some1 can tell how to downgrade from 1305 to 1204?

thanks
Had the same problem with my 570 GTX SLI on my P67 Deluxe and solve it by remove "Windows Loader" , installed another Windows7 edition and got my SLI setup working without changing the bios (1204)

Believe me it works, saw this solution in another fórum.... i still don't understand why....