You should look into getting a better cooler. When the OEM cooler ramps up, it makes a horrendous whine. Not real loud, but very annoying.
A great cooler to try would be the XIGMATEK Dark Knight
. I put one on a X4 955 system I recently built. I haven't checked to see what the loads temps are like, but it idles around 26° - 28°C. It's also very quiet.
Run this bad boy to see what your load temps are like: Furmark