When you have 4 cores, all doing the exact same thing, running the same program, I think my version of the truth looks a lot more believable than the raw data coming from these sensors would lead you to believe. If I had a dollar every time someone remounted their cooler because their temps didn't look right, I'd be a rich man!

All you have to do now is head to the bios and boot up at 266x6 ~ 1600 MHz and 1.10 volts and make sure that your idle temps are realistic. I'm pretty sure they will be.