In short, the AMD Radeon HD 6850 1GB that came with my Pavilion H8-1280t fried. I asked a few IT friends what a good replacement card would be, and they recommended the AMD R9 270X.
I bought the card, a new power supply, installed everything and the following happened:
- System seemed to boot up fine.
- No signal to the monitor.
- After 10 seconds, the PC restarts (it doesn't restart again). Pressing the power button after the first restart shuts down the PC right away.
- Reinstalling the old graphics card allows me to get into safe mode. The monitor works with it installed.
Is there any particular reason the new card isn't working? I've been led to believe by multiple people that it should be compatible.