Ok so I have the hpe h8-1220 stock until this point. Recently I bougjt a new 500w psu and an R9 280x to replace the stock geforce gt530. Fx-8100 cpu, I know. 10 gigs 1333 ram, 2tb hdd. My bios is the ami ang_713. The thing is when I install it the way I looked up all over the internet, I get no display. Like the computer is running and I get no POST so that isn't the thing. I can put in my old gpu and it works fine. Pls help. :-(