I have recently installed a Radeon 6770 into my HP Pavillion P6000. Unfortunately my computer is unable to read it and boots up with what appears to be no graphics. Here is a picture of my setup for reference: http://imgur.com/a/0ztOC
My PSU is 650W so I don't think it is a power problem. The computer runs and sees my backup card-- a GeForce 7800 GT just fine. Anyone have any idea what is wrong here? My understanding is that my mobo (Pegatron M2N78-LA) wouldn't have any compatibility issues. I have tried installing CCC and manually adding it to device manager without luck. This is also the second Radeon 6770 I have tried, so it is likely not the card.
If anyone has any thoughts on this it would be greatly appreciated. Thanks!