I don't really know what going on, but when I went to play BF4 this morning I was getting less than 10 fps. Then i tried to run Heaven and my avg fps was 2. My temps are around 67-75c on my Asus GTX 980. I'm running everything stock speeds now, I was playing The Witcher the other day, using afterburner I boosted the Core Clock 185mhz and the Memory clock 175mhz. I thought that might be my problem but I wasn't overclocking when I was playing BF4.
specs
i5 3570k
Krakenx61
Asus GTX980
Corsair RM 750
2 SSD
2 HDD