I had a AMD Radeon 3400 Series. I wanted to upgrade so I could actually use my gaming computer for gaming. I got a EVGA GeForce GTX 960 and I took the Radeon out and put this one in and I don't think that I had the 8pin in at this time. It loaded fine though but I realized I wasn't getting 1920x1080 so I decided to restart my computer. I restarted and then the card stopped working. The fans spun but when I powered on the computer the graphics card didn't work and it said No Input signal for VGA and then my monitor went to sleep. I have Razer mouse and keyboard so if it works they light up and that is how I usually tell but they never show any light unless I don't plugin the 8pin. But then they light up for a short time then the computer makes 4 beeps. I have an ASUS M5A99X EVO Motherboard and I was told by EVGA Tech Support that it may not be compatible which I don't want to believe. Also the VGA Led has been lighting up solid red since the problem started. I could use some help for this has taken 6 wasted hours of my life from me already and I still can't seem to fix the problem.