my asus p4p800-e deluxe board is pretty good I think, but there is no way I'm running -15C of the board readings. My idle is around 26, and load is anywhere from 30-33 (depending if I've cleaned out the air filters). I'm running a big typhoon with a 110 cfm fan on a northwood...I want it to be cool...can you tell?
But those readings look normal to me. It's about 70F here in CA, where I live. So that's about 21C. So if you are correct abou the temps reading really high, then I'm running my proc at load at about 15-18C...sub ambient? I don't think so...my air cooled case isn't that good....but it would be nice to know how to check for this without installing our own temp sensor.