Slay0r: The original versions of RealTemp used TjMax=95C for the Q6600 G0. Based on rge's testing, which I fully agree with, 95C is too conservative. The actual core temperature is probably about 5C higher than the temperature I was measuring on top of the IHS with the IR thermometer. I originally didn't take into account that not having a heatsink installed changes the pressure between the cores and the IHS which changes the heat transfer. I also didn't take into account that the IHS heat spreader does an excellent job of spreading heat away from the cores. I think rge proved that point very well when his E7200 went nuclear.
It makes sense that the actual core temperature is going to have to be slightly warmer than the IHS temperature that I measured.
In theory, RealTemp should be reasonably accurate for Core i7. These new CPUs have TjMax information stored within them which RealTemp is able to read so that can't be argued about any more.is this accurate for Core i7???
If you look at the screen shot above it's obvious that Core i7 still has slope error where the sensors move at slightly different rates compared to the actual core temperature. It's easy enough to correct for slope error with RealTemp.
rge showed us how to calibrate a Core 2 Duo here:
http://www.xtremesystems.org/forums/...postcount=2429
I believe a Core i7 Quad can turn off 3 of its 4 cores at idle and power consumption is about half as much at idle as a previous 45nm Dual Core. When calibrating a new Core i7, the gradient between your reported idle temps and your air or water temp is probably going to be a couple of degrees less than what rge found when testing his Dual Core. If someone wants to buy him a board and a Core i7 to do some testing with, I'm sure he won't complain.
rge and I also agree that Intel's explanation of slope error in their recent presentations is a little misleading. We've both found that the original RealTemp graph in the documentation is a much closer approximation to what these sensors actually do.
In order to come up with a more accurate calibration formula, I need a few people with some seriously messed up 45nm sensors to post a screen shot of the new Sensor Test. Two sensors on the same die moving at vastly different rates from idle to full load is what I'd like to see.
The Core i7 sensors are looking very similar to the previous 65nm temperature sensors which were a lot better than many of the Core 2 Duo 45nm sensors. My best guess is that even without any calibration, Core i7 reported temperatures from 70C to 100C are likely within a degree or two of the actual temperature.
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