I have a P7-1254. I have upgraded the processor to an A8-3870k and added a Sapphire Radeon HD7770 GHz video card. Also added a 700w power supply. The video card worked for about a week. Then the power supply failed and I used the old supply and onboard video until I received the replacement power supply. When everything was re-installed, the video card is no longer detected. The card is well seated, and getting power, but video only works through on-board now.
The BIOS on this model is extremely limited, there are no selections to control on-board video.
I swapped the card with a GTX card from another machine. The GTX card is detected and works fine. The Sapphire card is detected and works fine in the other machine. When I put it back in the HP machine, not detected.
Anyone have any ideas?
Thanks.