Well here it is =] I did remove the thermal pad that came on the Backplate as i got a bad experience with it on my 580 aswell. They are leaking oil, nothing to worry about, but it all becomes a mess. I only added thermal pads for the memory.
And i thought the Fan Speed Control didn't work, but it does work. Just none of the programs are able to properly read the RPM anymore.
I have just started OCing it. I'm currently only at +100 on the core which is stable, so i'm going with +25 steps now.
I didn't run a benchmark to burn it as that's rarely gonna happen in games. So instead i started a new Skyrim game and currently the temps are not going over 55C with the Fan Speed fixed at 30%.
I'm glad i waited all thise time for the Reference 4GB as i hit 2298 MB VRam in Skyrim at 1680 x 1059 with 4xMSAA + FXAA. And that's only 1 screen.