Funny you should suggest that Sunrider, I installed Speedfan when my friend called in to collect his new system. I did a quick check and that is the speed it reported but at the time I didn't know what it should be.
He is going to run it for a few days or so and see how it turns out. I did run IBT on very high and it passed every time. Hottest core was 65c at 4.49Ghz and 1.325v core. I will try reducing the voltage and see how low I can get it at that speed, when I get the chance.