Heat problems I7 4790k

rexo

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Aug 16, 2014
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Hi there, I built a new rig a few weeks ago and it has the 4790k processor, I had some heating problems with it before but I thought that it was because of the stock cooler (the cpu got to throttling temps while rendering a 2 min clip). Now I have the Noctua NH-U12S for a few days the rendering sits at 70 (temps are in celsius :) ) now but there is no way I can possibly let prime85 running more than 5 mins even on small ffts because it hits 90 degrees and I really don't feel comfortable with that, should I ? I don't even try the large maximum heat ffts because it hits 90 degrees instantly. The idle temp is arround 40 degrees and when I play games it sits arround 65-70, another thing I noticed is that the temps usually spike for 3 to 5 degrees sometimes. The cpu is not overclocked at all and is running a 1.23 vcore voltage ( it can run 1.2 fine but it doesn't impact heat so why bother with any crashes).
To sum things up my questions are:
Is it normal for the 4790k to not be able to run prime95 with the Noctua NH-U12S ?
If it is not normal what mistake(s) did I do ? ( I am not perfect by any means, to be honest I consider myself a noob )
 
Solution
Here it is again: Prime95 Version 26.6 - http://windows-downloads-center.blogspot.com/2011/04/prime95-266.html

Please read the entire Sticky: Intel Temperature Guide - http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html

" ... Section 11 - Thermal Testing @ 100% Workload ...

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 extreme temperatures. The FPU test in the software utility AIDA64 shows the same results.

It's not necessary...
Your temperature appears quite high.

I'm suspecting you have incorrectly setup the settings like the voltage. Please do THIS:

1) BIOS-> "XMP" then SAVE settings

2) restest for heat

Also, make sure you have the fan control software setup for the motherboard. I recommend about 40% fan speed for that cooler until about 45degC then slowly ramp up, say 100% at 80degC.
 

CompuTronix

Intel Master
Moderator
Here it is again: Prime95 Version 26.6 - http://windows-downloads-center.blogspot.com/2011/04/prime95-266.html

Please read the entire Sticky: Intel Temperature Guide - http://www.tomshardware.com/forum/id-1800828/intel-temperature-guide.html

" ... Section 11 - Thermal Testing @ 100% Workload ...

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 extreme temperatures. The FPU test in the software utility AIDA64 shows the same results.

It's not necessary to run AVX code for thermal testing. 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. ... "

CT :sol:
 
Solution

rexo

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Aug 16, 2014
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0
4,510


Thank you for the Intel Temp guide, it helped a lot, also the new version of prime seems to do the trick. Another problem I think I had was the thermal paste it looked something like this http://imgur.com/4F6FJHk , which is odd because I used the middle drop method. Now, with the new prime and new thermal application during small ffts I get a maximum of 80 degrees on one core (which always is the hottest) when the test is approaching the end. Now the idle temp is at 30 degrees more or less thank you for the article and your answer :) now it all works fine and I don't go in the 90 range anymore.