Real Temp - New temp program for Intel Core processors

[rge]

RealTemp says that core temperatures are 60 to 64. But, HWMonitor, Everest and Coretemp say that core temperatures are like 70 to 74.

Should I believe Realtemp? It seems to be a better program, but this is 3 vs. 1. I'm little bit confused with this now, so would somebody tell me, which is right.

HWMonitor, Everest, and Coretemp are all using tjmax of 105 for E8400 and all from the same one faulty source of information, and presumably based on 45nm mobile cpus, so it is really 1 vs 1...but...

Mathematically, using intels own formulas and specs, you can show a tjmax of 105 is not plausible for E8400.

known facts
1) (see pic of intel formula)
2) at idle EIST enabled state TDP = 6-8W (intel specs)
3) thus at idle 6x200 mhz, .95vcore, TDP<6-8W
4) casing temps measured by multiple fluke measurements of E8400 is 95C when DTS=0.
5) casing temps are going to be equal or slightly lower than Tcase measurements, they can not be higher.

Suppose 105 tjmax
- Solving for theta (core to case) = 0.5 C/W
- At 0.5C/W, max gradient from casing to tjmax at 6x200 mhz and vcore .95 is 0.5C/W x 6W or 3C, more likely gradient .5x4W or 2C, plus or minus 1-2C error.
- therefore if 105 tjmax is correct, casing temps would have to be 102C to 103C, plus or minus 1 or 2C error, which is not the case.
- Or for 105 tjmax to be correct, at 6x200mhz and vcore .95, TDP would have to equal 20W, which is not even close.
- Without a heat sink, the gradient would be even less, which makes 105 again, highly unlikely.

105 is not plausible unless some of intels specs are way off.

Suppose 95 tjmax
-Solving for theta (core to case) = 0.35C/W (which as an aside is a similar value to whats listed in intel research papers)
- At 0.35C/W, max gradient from casing to tjmax at 6x200 mhz and vcore .95 is 0.35C/W x 6W or 2C, more likely gradient .35x4 = 1.4C.
- For 95 tjmax to be correct, casing temps would have to be 93-94C +/- 1-2C error. Casing temps of 95, as measured, would be within 1-2C error.

95 tjmax is possible based on intel specs and formulas. Also with no heatsink, the gradient should be less than 1.4C, and has been measured by independents to be around .5C, making 95 not only possible, but likely.

I would not argue with anyone who claims tjmax is 94-98, but 105 contradicts known intel specs and formulas and is way outside measurement error.