I built my computer a little while back. I got it working on October 4th, and everything has been going just great. My game is nice and smooth, I can run an ENB and all that stuff. Recently, I reinstalled my game, and there's a lot of lag - increasing every day. I used to be able to get 70FPS when I wasn't recording, now it drops down to 40, sometimes even 30. The lag is sort of temperamental, so one second I'll have 70 FPS, the next 50, the next 35, and the next back up to 50, etc. I've had to put my LCPDFR videos on a pause, and I really have no idea what may be causing this. 1 stick of RAM also died on me (no clue how), so I'm running on 4GB RAM until my 16GB will arrive on the 22nd. Could the issue have anything to do with the lack of RAM, and how I'm running an ENB with modded cars and all? My GPU doesn't seem like it's dying, because everything is working fine. I also recently cleaned all the dust out of the GPU, and the rest of the components, so the fans should be all clean, and should be keeping the inside of the case cool. I've been searching for causes everywhere, but I didn't find anything. Could anyone possibly help? 

I know you don't want to hear this Mustu, but... car mods (ELS)? Did you recently add a new one? 

LOL, yea. But, I tried multiple other cars, and they worked fine. You know I can't live without ELS :(