It's all good...you know 65nm can go as high as 1.55v right? just I wouldn't run it 24/7, only for benchies.
See if you can oc it a bit and get a better score. =)
i ran my machine @ 2.8GHz for months (at less than default voltage) without any hassle. the only thing with my mobo is that it's a passive cooled FSB so i went down to 2.2GHz to save burning it out faster
the machine still does all i want it to do without any problems so i don't really need to push it any further.