Unfortunately had this ASUS mb too and since it was not revision 2, it does not technically support the latest FX chips. That said I have got an AMD 8350 and an AMD 9590 to work on it. However it just barely supports the voltage and pushing GHZ caused it not to post. I got the dread red cpu led. It is now a large paperweight. You will likely need to go the the AMD support site to get a list of the boards the 9000 series FX chips are supported on. The Sabertooth while claiming to have military spec was very fragile in setup and the leds to alert CPU, VGA, and memory are annoying if not a poor design. Also if you are still in warranty with the board, you could RMA and get a new one.
Also I agree with SR-71 that with the 9000 series, watercooling adds better heat capacity that air. The noctua might be suitable if you do not overclock. The noctua cooler is well rated. I installed a CoolerMaster Nepton however the fans are loud and must be scaled down with a fan controller. I expect your Noctua to have very little noise which is good considering you might have several video cards inside the case and the case fans themselves adding to the db level.