i have a 2500k w/ sli 780's on a Z68xud3h b3 f12 Bios  win 7 ult 64bit I just purchased a Xonar Stx and installed it right between the 2 cards on the PCI-E. Problem is the computer can't even get to the windows loading screen and just keeps rebooting itself. I then tried just using one of my...