My custom built desktop ran all of the games that I threw at it (mostly Skyrim, Grimrock, and the Dragon Age games) flawlessly on ultra. I stopped playing games for a while because of school work, and when I started up Skyrim again, I started getting crippling lag in both ultra and high settings, forcing me down to medium. This occurs in all of the games that I used to run perfectly. Here are my specs;
Operating System: Windows 7 Professional 64-bit
Mobo: Gigabyte Z68A-D3H-B3
CPU: Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz (4 CPUs), ~3.6GHz
Memory: 8192MB RAM
GPU: AMD Radeon HD 6950 w/ 2GB dedicated
I did some research on similar problems beforehand, and haven't found anything that helped me. My computer recognizes my graphics card and my monitor is plugged into the graphics card. I tried using someone else's 6950 to the same effect. I tried rolling back my drivers. (As far as I know) There are no processes running in the background that weren't there before. I've tried closing my antivirus while playing to no effect.
Anyone have any idea what can be causing this so suddenly?
EDIT: Skyrim shows two AMD Radeon HD 6900 Series options when choosing a graphics card, both options have the same amount of lag. Dunno if that's important.