560M throttling on BF3 and other games.

So, my 560M has been refusing to reach it's true potential. I overclocked it to 900/1800/1350, and it went through a whole unigine benchmark/3dmark11, and max temp was 85C. Yet for some reason in BF3, I'll be playing with a solid 40-50fps (medium, no aa), and all of a sudden im getting 9 fps and someone just killed me and I didn't even see them. Then after 30 seconds, magically back to normal. So I opened MSi afterburner onto a second monitor while I was playing. Sure enough, it downclocked to 230/660 (something in the 200s, idk). After about 30 seconds it went back to normal. Is it temps? Should I go back to stock? And even sometimes, I dropped to about 25 fps, and the card has it's normal clocks but the GPU usage drops to a steady 50%. This is incredibly annoying.. I have drivers 306.97. This also happens on L4D2 and WoW. Please let me know why this is happening

 

I'd suggest you first go back to stock clocks and check again. If the problem still persists, then revert to the earlier drivers. 306.97 came out like a month ago right? Did you start noticing this problem recently or earlier?