I have a Corsair H110i hooked up to mine. I run a 4.6 OC at I think around 1.23v and my temps don't go above 54 degrees. I have achieved a lot higher overclocks with this chip, getting up to 5.0, but I had to give it a lot of juice and the temps were more around 78 to 82 under load. This is "ok," but for day to day use, I'd rather run it lower and cooler.
Adam