Gpu Doesn't Overclock When Running The Game

[Obliterator2]

Hi, I've got a GTX 680 which is overclocked, others games run at the clock speed of 1228mhz, but warframe won't go over 1006mhz, which is about 80% of that first value I put

I used to get 90+ fps, now I'm running on about 40 average and going as low as 20 for infestation mobile defenses, my cpu can handle it alright, so do you think it would be the nvidia update which may have done this? (the only thing i can think of)