Originally Posted by foothead
Try the new video card only - it could be defective. If it works fine, then I'd start checking BIOS settings and PSU rail distribution.
EDIT: This is gonna sound kinda weird, but have you tried using two crossfire bridges?
the radeon 5770s dont have two places to connect the bridges, only one.
ive tried both video cards in both ports and they work fine by themselves, windows just wont boot by staying at "starting windows" or blue screen > restart when I have just downloaded the drivers for both (which i need a restart for them to take effect)
how can i check the psu rail distribution? guessing in the bios, ill check that out.