How can i enable it on Afterburner?

I'm not exactly OC'ing, but my card came factory overclocked (from around 985 to 1010mhz), and i've noticed core clocks tend to drop below 1000, sometimes down to 950, so i'm guessing i should increase power limit?
 


yes, keep an eye on temps
 


70°-75°, max i've ever seen is 76°, temperature target is set to 100°c by default so i don't think temperatures are the problem, right?