Just wanting to say, Great overclock, we recently brought my friends cpu to 1.9 ghz, a 700 mhz jump, I would put a aftermarket fan on the northbridge, Now I dont have a overclock on my current setup, but we were modding the case a little bit and bought fans for the northbridge, hdd, another case fan etc, and before I put my new fan on the northbridge, It was very hot, I couldnt leave my hand there for more than a few seconds max, so I think that a lot of northbidges are very hot without any ocing, but just to be safe, I would put a fan just incase