Thanks kpo6969. The more data the better. Each one of these tests tells a story.

I found the Core i7 920 test on the previous page very interesting. Core 0/core 1 mirror each other and core 2 / core 3 mirror each other. This makes it look more like two separate Dual Cores similar to the previous generation and not 4 unique cores.

Between 12.5% and 75.0% the difference between sets of cores is very consistent at ~2.7C. This doesn't fit the previous generation's slope error model. All 4 cores are moving on the same slope, they're just offset by a couple of degrees. Is that a slight difference in TJMax due to calibration error at the factory or is it just normal behavior with one side of the CPU running slightly cooler? Many 65nm Core 2 Duo based Quads looked similar to this.

I hope I see a few more posts with examples of Core 2 Duo slope error. rge and I noticed during testing that by 30 degrees to TJMax, both cores of a Dual Core generally lined up and there wasn't any significant difference from 70C to TJMax. That's different than the graphs that Intel presented at IDF. Their model implies that slope error goes from idle to TJMax.

The other thing I noticed was a huge drop in temperature when Prime 95 was stopped compared to what a Core 2 Duo does. It looks like most of the cores have been turned off which I think is what happens at idle with Core i7.