Steam Performance Issues

AS some of you may already know, the game is available on steam for download. I went ahead and got it on steam. I launched it, it ran fine for a few minutes but then my FPS dropped to 20 and refuses to budge. I've been playing it for months without a problem. And now I can't play at all due to low FPS. My specs are as follows: AMD FX-8350, Asus Geforce GTX 660, and 8gb of system ram. I also noticed that while playing, my GPU will not increase in tempreture even though it says it is at 90% usage. Normally it is at about 51c while playing. Any ideas? I am currently in the process of reinstalling the game through the website, and will update when it is finished.
*Edit* My video card seems to be broken, and is doing the same to all my games, not just BeamNG.

 

I'm utterly confused. Signed up for Steam and they are taking forever getting me my account info, program dropped to 12FPS yesterday after fresh download so I deleted it all thinking it was the new Nvidia driver problem and now
I sit here with no Beamng AT ALL. My dumbass is my dumbasses own worst dumbass.