I took my E8400 back to my local retailer and he exchanged it with a new one with no questions asked. My new cpu cores both register 38C at idle (at 4.0GHz), most of the time. When you first boot up one core is stuck at 32C. I don't think these core temp anomolies effects the overall performance of the processors...it is just the temp reading which is wrong, on mine only at idle.