Are you sure that this is stable and won't damage your card in the long run?
About temperatures: I have the HAF 932 Tower Case from Coolermaster, which is fitted with 3 big fans and 2 small fans.
Cool Air is getting sucked in and hot air will get out - so there is a good airflow already.
One of the big fans is right next to the GPU and blasting cool air in. No need for a extern fan.
@ trell0z: Okay, i will try it. But i think F16x16 is already the best option. I used autotune to get that value.
Did anyone of you guys try to change some driver settings?
I still want to know if there is an option to improve the performance for the mining task.