At wits end with 4790k and temps. Have tried everything I know!

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chindave

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Nov 26, 2014
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Hello all, long time reader and head scratcher, first time poster. I have no hair remaining I'm afraid and hope someone out there can help me!

I recently built a new video editing/gaming system with the following specs:


  • Asus Maximus Hero vii
    4790k
    SLI GTX 980
    Define Fractal R5 w/ additional Noctua fan for extra airflow
    Phantek PH-TC14PE (Which I picked up because it served me so well in my last build.)
    16GB TridentX DDR3 2400mhz

After building it, I found that the system was running far hotter than anticipated. I chalked it up to the 4790k running hot so I bought the following and rebuilt it last night:


  • Swiftech H240x
    Phantek Enthoo Luxe
    An additional Phantek XP fan for the front of the case

To my dismay, the temps are equal or possibly worse than before the rebuild despite the Swiftech.

I had reseated the cooler in the last case 3 time and have done it once with Swiftech, it is not an issue there. On top of that, I mounted the optional third fan on the H240X, for push pull, just to quell any fears I may have had. Clearly, it didn't help.

My idle temps rarely go under 30, usually hovering around 35 with an ambient room temp of about 22c, which is common, I've gathered.

What concerns me is load temps. The following is my current example clock, not my end goal. I chose a low voltage to help get my point across. I have tried, so, so many. Who else gets terrified when their temps hit 90+ on all cores!

@ stock 4GHz, 1.075 Vcore and 1.050 Cache, if I launch IBT, I immediately hit 60-63.

Prime 95 hits 55 right away, running version 26.6 and continues to climb.

This is not a stable clock, so running OCCT with AVX eventually causes a crash after hitting 65 or so as does Real Bench and IXU.

I've yet to find a single stable clock and my bios suggested automatically skyrockets IBT into the nineties.

I'm lost, confused and to be quite honest, pissed off with all of this.

Does ANYONE have any help or input in regards to my situation?

Thank you in advance!
 
Solution
The Original Ralph
below are two links to the intel community forums re overheating issues with the i7-4790K and the i5-4690k CPUs
1st link is an intel posting:

Troubleshooting Intel® Core™ i7-4790K / i5-4690K overheating

2nd link is a 39+ page thread on intel's discussion forum - there are intel reps posting in there

How best proceed with overheating i7-4790K?

the 2nd thread, you can speed read thru the first 15-18 pages - mostly discussion about de-lidding the CPU which is kind of drastic and definitely invalidates your warranty.
I found my solutions in that 2nd link - but the solutions are varied as apparently are the causes. If you just bought your cpu i wouldn't worry about delidding your cpu, as it appears it was only the first...
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DubbleClick

DubbleClick

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Jun 16, 2014
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Definitely do a bios update. But either way, 65c aren't much, just more than you might expect with that cooler. Which means your cpu does either have problems (less than 0.1% chance if I had to guess), voltage regulation and sensors of the motherboard don't work accurately (possible) or the cooler isn't fitted or working right (very very likely).
 
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Karsten75

Karsten75

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Oct 15, 2009
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I concur with your range of possibilities and would like to point out that mounting fans push-pull might in some cases reduce airflow if the fans aren't playing nice together.

OP did not mention if the radiator vents out of the case or takes in cool air from the outside. Additionally, before overclocking, verify operation with standard settings and standard voltages, etc. to observe the characteristic of the processor.

 
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The Original Ralph

The Original Ralph

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Sep 14, 2011
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below are two links to the intel community forums re overheating issues with the i7-4790K and the i5-4690k CPUs
1st link is an intel posting:

Troubleshooting Intel® Core™ i7-4790K / i5-4690K overheating

2nd link is a 39+ page thread on intel's discussion forum - there are intel reps posting in there

How best proceed with overheating i7-4790K?

the 2nd thread, you can speed read thru the first 15-18 pages - mostly discussion about de-lidding the CPU which is kind of drastic and definitely invalidates your warranty.
I found my solutions in that 2nd link - but the solutions are varied as apparently are the causes. If you just bought your cpu i wouldn't worry about delidding your cpu, as it appears it was only the first 3-4 months of shipments that required it. But the other solutions are

1) un-install mobo mfgr's software / performance utilities. I'm on an Asus board as well and the Asus AI Suite III does conflict with the bios - when i un-installed it, AND used the AI Suite cleaner utility after un-installing, my temps actually dropped 5-6 degrees at idle and 4-5 at full load. One item that persuaded to try this, my asus performance utility never showed higher than 67C for cpu temp. When i downloaded RealTempGT and Intel's XTU (extreme tuning utility) they both showed 99-100C - so i knew the asus utility was missing something in it's tables. Later i tried re-installing for a couple of days with same result as initial, ie higher temps and a "ceiling" temp of 67C, no matter what real temps were

2) clearing CMOS and RTC (instructions in your mobo manual) - that helped considerably but i still wasn't where i wanted to be -

3) updating or reflashing the BIOS

i've upgraded from the stock intel cooler to an aftermarket

the 2nd thread will probably take a few nights to digest but it is a good "step ladder" on the learning curve

and if it helps any, my cpu is an intel i7-4790 (locked or non "K") but i ran it for 3 months, rendering a ton of video files, relying on the asus performance monitoring utility showing 67C - like i said it ran at 99-100C nearly constantly during those ops, and a good number were 3 hour duration files. The i7 cpu has safety limits built in, power, current and thermal throttling when limits are hit, so it doesn't self destruct. Intel indicates in it's specs the max working temp for the i7-4790k is 74C (+/- 5C) with absolute max at 100C

Running at the temps mine did i was worried i'd damaged it - only reason i feel comfortable i didn't, in XTU there is a benchmark test that when you've completed it, it offers the option to post your score online and compare with others and you can select to compare only to identical CPUs - i've hit scores that are within one or 2 marks of the top scores for my cpu, and i haven't OC'd it. I do suspect i've probably degraded it's life expectancy some, but i'll probably upgrade before i notice it in performance.

hope that helps
 
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Solution
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Randal Davis

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Mar 10, 2015
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one thing i have learned after contacting Asrock for my issue. was that Prime95, does not give you a fair reading sometimes.

They asked me to download SiSoftware`s Sandra, to see if in fact my board had any type of issue. I know its sounds strange.
But when i was running Prime95 my self for testing, my system would shut down. Not due to overheating issue but due to the Prime95 is kinda out date. if you are running windows 8 or 8.1 pro. Prime95 is geared more for the users that are still using windows XP or later. So might want to get Sandra try that, and see what it says for your temp . Also Get Core Temp, for a more right on temp .. again Prime is not really set for windows 8 if you are using that. sure its a great bench mark and burnin test. but the temps are not up to par with alot of the newer boards ..

 
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CompuTronix

CompuTronix

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Nov 13, 2006
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Randal Davis,

Respectfully, you are not well informed and have drawn some incorrect conclusions.

The issue with Prime95 is not related to Windows versions; it's specific to Prime95 versions.

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

Core i 2nd, 3rd and 4th Generation CPU's have AVX (Advanced Vector Extension) instruction sets. Recent versions of Prime95, such as 28.5, run AVX code on the Floating Point Unit (FPU) math coprocessor, which produces extremely high temperatures. The FPU test in the stability testing utility AIDA64 shows similar 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.

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 Real Temp to measure your Core temperatures, as it was designed specifically for Intel processors: Real Temp - http://www.techpowerup.com/downloads/2089/real-temp-3-70/

Your Core temperatures will test 10 to 20C lower with v26.6 than with v28.5.

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

Thanks,

CT :sol:

 
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DubbleClick

DubbleClick

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Jun 16, 2014
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I've always felt the urge to jump in here, using prime95 28.8 (or any other version later than 26.6) is nothing that harms your cpu or produces less valuable results, contrary, it's much more efficient in getting prime95's actual job done - researching prime numbers. You should probably add the condition "for temperature testing" for the advice to not run Prime95 versions later than 26.6.
 
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CompuTronix

CompuTronix

Intel Master
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Nov 13, 2006
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Thanks, DC ... point well taken, however, this aspect is covered in Section 11 and 12 in the Guide.

Henceforth, I will make it a point to be even more specific, as almost no one bothers to read the Stickies. :pfff:

CT
 
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