Thanks again Solar, I'll keep that in mind.
Anyhow I'll probably get better cooling, either a way more efficient air cooler or an H100i or a Thermaltake Extreme 2.0. I know you are right and I probably don't need it, but the urge too keep tweaking is hard to resist!
I already ordered a board with the 990fx chipset. Its an MSI 990FXA GD80 V2. I heard they are good and read some reviews where it compared pretty well to the Crosshair Formulas, and it is much cheaper, although the BIOS seems not to be as good as Asus.
I just read your specs and saw that you are running an Antec 620. Are you happy with it? Is it very loud? How does it compare to an average/good aircooler?
Thanks for your help