Real Temp - New temp program for Intel Core processors

[rge]

I bought a Fluke with 2 thermocouples several months ago when I bought E7200, with intention of putting one in IHS and after measurements vs software, then second on core to measure versus IHS...but after learning about a few issues...and killing my E7200 within minutes of initial temp testing...

Thermocouples are very inaccurate for surface temp measurements, unless of course the surface temp=air temp, because if you lay one on surface 3/4 is sensing air temp, 1/4 sensing surface. When my IHS reads 95C by IR, the thermocouple will bounce around from 60 to 70C, but immerse the tip completely in boiling water and it is very accurate. Now I know why intel fully embeds it in the IHS, have to for accurate IHS temp. Even after you imbed it in IHS, it is now sensing 2/3 IHS and 1/3 thermal (?) adhesive (?) you used to seal it, and you have to recalibrate it by accurately measuring the surface temp of IHS at same time, or it will be off a few C (that is apparently why they use second source measurement of IHS in all research papers). And since it can not measure surface temps, I would have to embed my second one in the core or solder it to the side and then calibrate thermocouple to surface temp core. I dont know if that would kill cpu or not (had I not killed it temp testing, I was going to give it a go as the last test). Reason for having to embed the second one in the core, would be because I dont know down to 1C accuracy what the core temp is, hence I cant know the gradient. And since it is near impossible to test temp of core, because once you remove the IHS the temp rises so rapidly, you end up "guessing" at temp, definitely not accurate enough for 1C calibration.

Given intels recent chart...I could now compare IHS temp to thermocouple temp with heatsink off (versus software reading core temp as control), then use thermocouple to measure gradient with heatsink on (using software core as control) and then would know the difference in gradient with heatsink on or off, but only within 1C of error or more if calibration is different for the thermal adhesive I use with heatsink cooling it....but again that is not going to give me actual core temp, because I dont know exact temp of core at tjmax.

Also if I embed one in the core (without killing it) or soldered to side + surface core recalibration, and embed one in IHS, not sure if it will change temp 1-2C after my piss poor die reattach substitute. Thought about drilling hole, but then how do I solder to core. And to give an idea of how hard it would be to calibrate the thermocouple on core after soldering it to the side (since 1/2 thermocouple is reading solder temp)... when I delided the E7200, I turned computer on with delided IHS pressed up against the core, immediately removed once computer running and temps went from 60 to 138C before smoking and dieing (by realtemp core reading) in several seconds despite powerful box fan blowing, though quickly looking back and forth between IR gun and realtemp and getting two pics flashed, i was approximating a tjmax of 90C. Since I know tjmax is higher now, either realtemp and IR never had chance to read same temp at same time or I changed the resistance so much by removing the obviously very effective core cooling IHS, that cental core was hotter than its surface, like at load.

I was only half kidding in an earlier post about an MRI temp...I know you can read tissue temp to within 1C, without disturbing anything..that would be the way to accurately measure temp while determining exactly what you were measuring at same time, without destroying die attach.