I have the i7-2600 in an Intel board and the temps and CPU fan run higher when in the BIOS. I think this is normal. I'm guessing because there's no throttling of the CPU. It's probably running at/near clock speed and generating more heat. Also, I noticed that the CPU temps went down as I put more hours on the machine. I'm sure this is the settling of the heat compound. Some need about 25 hours of run time. Also, make sure the fan mounting pins are fully engaged. These pins are what maintain the required pressure on the CPU. It's easy to miss getting the pins to "snap" in place.
Forgot to mention: The first BIOS update took care of a high speed CPU fan condition on my board too. Check to make sure you have the lastest version for your BIOS.
Yeah well mine is OC'd to like 5 Ghz on a nicely done aircooling and it's running at 42 c idle...
When gaming or benchmarking at very high specs, i can wack it up to about 68 c at one or two of the cores.. Now thats one thing, - but in BIOS it's a totally different story.!
Before OC it was at 35 c idle and 42 c in BIOS. Now it's like 55 in BIOS wich is about the same when im running msn, skype, a video conversion or whatever at the same time.?!
It could be a lot of things like powerdraw or etc. and i wouldn't really be bothered about it... As far as my computer doesn't exceed the 72 c... i mean i AM only using aircooling so the risk is there with an OC at 5 GHZ u know...?!!