Prime95: Insane temps on 4770k Non-OC and with OC

[EmilAblaa]

Hello guys

I recently upgraded my 4690 to a 4770k because it was a cheap upgrade for me, considering the 8 threads + being able to OC.
However I get insane temperatures while stress testing with Prime 95 (Small FTTs), both without OC and with OC.

WITHOUT my OC i got up to 86c after just ONE minutes... I have tried to remount the CPU cooler again to fix the problem (+ replacing thermal paste) but without any huge improvements.
With OC I got kinda the same ~87c after a short duration of stress testing.
In both situation the CPU cooler is running at 1600 ish RPM.

I've tried to OC a couple times before, but never with these unreal temperatures.

What to do?
Am I just unlucky with my CPU silicon lottery?

After 1 minute of Prime 95 Small FTTs without OC:
https://gyazo.com/ae6d557152517dd41697bb563135a8d5

Specs:
Intel® Core™ i7-4770k
Cooler Master Hyper 212 Evo
ASUS Z97I-PLUS
ASUS STRIX GTX 970 4GB
6GB Crucial Ballistix Sport DDR3 1600MHz
Cooler Master V550
Kingston HyperX Predator 240 GB M.2
Fractal Design Node 304

Thank you!

 

[CompuTronix]

EmilAblaa,

Do NOT run any versions of Prime95 later than 26.6. Here's why:

Core i 2nd through 6th Generation CPU's have AVX (Advanced Vector Extension) instruction sets. Recent versions of Prime95, such as 28.9, run AVX code on the Floating Point Unit (FPU) math coprocessor, which produces unrealistically high temperatures. The FPU test in the utility AIDA64 shows similar results.

Prime95 v26.6 produces temperatures on 3rd through 6th 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 significantly larger Die.

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.

Use Core Temp to measure your temperatures - http://www.alcpu.com/CoreTemp

Your Core temperatures will test 10 to 20C lower with v26.6 than with v28.9.

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

Thanks,

CT

 

[EmilAblaa]

EmilAblaa,

Do NOT run any versions of Prime95 later than 26.6. Here's why:

Core i 2nd through 6th Generation CPU's have AVX (Advanced Vector Extension) instruction sets. Recent versions of Prime95, such as 28.9, run AVX code on the Floating Point Unit (FPU) math coprocessor, which produces unrealistically high temperatures. The FPU test in the utility AIDA64 shows similar results.

Prime95 v26.6 produces temperatures on 3rd through 6th 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 significantly larger Die.

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.

Use Core Temp to measure your temperatures - http://www.alcpu.com/CoreTemp

Your Core temperatures will test 10 to 20C lower with v26.6 than with v28.9.

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

Thanks,

CT

Thank you so much for your answer. You were kinda right. My temps dropped about 16c with the older version of Prime.
I am now getting a max of 81-82c after 20 minutes of Small FTTs @ 4.2 GHz instead of the higher 80's celsius.

This looks more like a OC, I can live with.