Quote Originally Posted by unclewebb View Post
If you are confident that your heatsink was installed properly then it is likely that the cores are not making proper contact with the IHS. It's rare but it does happen. If the cores are not transferring heat into the IHS then even if you installed the heatsink correctly, your temps would be much higher than normal.

CPU temp readings from motherboard diodes may not be perfectly calibrated or 100% accurate but in your case, it confirms that your new E8400 is running way hotter than the first one.

It probably runs fine at default clocks and voltage so you might have a hard time getting Intel to replace it. Hello EBay!
lastly please have a look at those pictures and tell me if you still think the same...

lowest idle


lowest load



daily (for now at least) idle:



and load