Does prime95 damage haswell-e processor?

Run ASUS Realbench. I used it myself(have a 5820k)as it's recommended by ASUS' forum members for Haswell-E. Using aircooling and a Noctua NH-U14S, I was hitting 91C on hottest core using the stresstest(was only temporary until integrating into my waterloop). The newest version of prime supposedly pulls extra voltage (if using adaptive voltage) and high wattage through the VRMs when overclocked due to the AVX instructions. It can damage the CPU (according to ASUS). Here's a link if you wanted to read. http://rog.asus.com/365052014/overclocking/rog-overclocking-guide-core-for-5960x-5930k-5820k/ BTW, nice Cinebench score , got around 1303 myself @ 4.4Ghz.

iopihop,

Two important items that haven't been discussed;

(1) What is your ambient temperature?

(2) Prime95 version 28.5 should not be used on 22 nanometer processors. Moreover, in the above link that 1LiquidPC was thoughtful to provide, Asus was not nearly specific enough, as they failed to mention which versions of Prime95 are unsuitable for stress testing. Although Asus stated the effect as excessive power draw, which in turn creates unrealistically high core temperatures, they did not explain the cause, which is AVX code.

This is discussed in the following Tom's Sticky: Intel Temperature Guide - http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html

Keep in mind that the Guide uses Prime95 version 26.6, which is the most recent pre-AVX version. Small FFT's is used for a 10 minute thermal test only, not for stability testing.

" ... Section 12 - Thermal Testing @ 100% Workload

Prime95 Small FFT's is the standard for CPU thermal testing, because it's a steady-state 100% workload. This is the test that Real Temp uses to test sensors. The link above is to version 26.6, which is well suited to all Core 2 and Core i variants.

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.

Prime95's default test, Blend, is a cyclic workload for testing memory stability, and Large FFT's combines CPU and memory tests. As such, Blend and Large FFT's both have cyclic workloads which are unsuitable for CPU thermal testing.

Other stability tests such as Linpack and Intel Burn Test have cycles that load all registers with all one's, which is equivalent to a 110% workload, and are also unsuitable for CPU thermal testing. The software utility OCCT runs elements of Linpack and Prime95.

Shown above from left to right: Small FFT's, Blend, Linpack and Intel Burn Test.

Note the steady-state thermal signatures of Small FFT's, which allows accurate measurements of Core temperatures.

Shown above from left to right: Small FFT's, Intel Extreme Tuning Utility CPU Test, and AIDA64 CPU Test.

The "Charts" in SpeedFan span 13 minutes, and show how each test creates different thermal signatures. Intel Extreme Tuning Utility is also a cyclic workload. Although AIDA64's CPU test is steady-state, the workload is insufficient ... "

iopihop,

Please download Prime95 version 26.6 - http://windows-downloads-center.blogspot.com/2011/04/prime95-266.html

Run only Small FFT's for 10 minutes.

Your core temperatures will test 10 to 20C cooler.

Also, please read this Tom’s Sticky: Intel Temperature Guide - http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html

Thanks,

CT