OK, I plugged the adapter into my GPU and PSU and my screen came on! (Thank you.
) And after I restarted my computer, I installed the Nvidia drivers. So, how do I benchmark my GPU to test it fully? Thank you again, you've been a great help man!
Edit: Nevermind, I found FurMark and tested it with that. (Unless there's something better...) Thanks a lot man, you saved me in a way, I thought I had bought a Graphics card for $140 for no reason.