shandidy,
Please use only P95 version 26.6 -
http://windows-downloads-center.blogspot.com/2011/04/prime95-266.html
Your Core temperatures will test 10 to 20C cooler than P95 version 28.5. A Thermal Test only needs 10 minutes of Small FFT's.
Core i 2nd, 3rd and 4th Generation CPU's have AVX (Advanced Vector Extension) instruction sets. Recent versions of Prime95 run AVX code on the Floating Point Unit (FPU) math coprocessor, which produces unrealistically high temperatures. The FPU test in the software utility AIDA64 shows the same results.
Prime95 v26.6 produces temperatures on 3rd and 4th Generation processors more consistent with 2nd Generation, which also have AVX instructions, but do not suffer from thermal extremes due to having a soldered Integrated Heat Spreader and a 35% larger Die.
Concerning ambient temperature, most places have a thermostat in a hallway. That's all you really need to roughly determine ambient temps. Can you guestimate? Is it Northern hemisphere winter cold, or is it Southern hemisphere summer hot? Maybe this will help:
"Ambient" temperature is the temperature measured at your computer's air intake.
Standard Ambient temperature is 22C. This is a very critical measurement, because
Ambient directly affects all computer temperatures. Use a trusted analog, digital or IR thermometer to measure Ambient temperature.
Here's the temperature conversions and a short scale:
Cx9/5+32=F ... or ... F-32/9x5=C ... or more simply ... an increase of 1C = an increase of 1.8F
30.0C = 86.0F
Hot
29.0C = 84.2F
28.0C = 82.4F
27.0C = 80.6F
26.0C = 78.8F
Warm
25.0C = 77.0F
24.0C = 75.2F
23.0C = 73.4F
22.0C = 71.6F
Standard ... or ... 22.2C = 72.0F
21.0C = 69.8F
20.0C = 68.0F
Cool
As Ambient temperature increases, thermal headroom and overclocking potential decreases.
You might want to give this Tom's Sticky a read:
Intel Temperature Guide -
http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html
CT
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