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Old 13-06-18, 10:32 AM
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CalVic CalVic is offline
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4790K Baking Extraordinaire

Hey Forum!


I've been absent as of late, to be honest I kind of dropped out of interest in hardware. That is, until I started watching LN2 videos again and among other things!



Anyway, I've been having an issue with keeping my 4790K temps in check for a while now. Usually I can fix the issue with the usual tricks. But it seems I am at a loss now. I use RealBench as my preferred benchmark to ensure somewhat realistic load on an overclock.


So the issue? My 4.6Ghz 4790k reaches 95 - 98c @ 1.115v during the video encoding stage of Realbench which then results in instability and then a crash.

Hardware:
  • 4790k 4.6Ghz at 1.15v
  • Uncore/Cache 4.6Ghz @ 1.2v (Running stock clocks at the moment)
  • Maximus VII Formula
  • 1200 Watt PSU
  • Corsair H110i GTX (Configured as Intake)
  • IC7 Thermal Compound
  • sh!ty-for-thermals NZXT S340 case
Settings:
  • LLC Level 1 (I usually roll with Level 8)
  • Adaptive Voltage with Turbo @ 1.15v (Have verified with Manual Mode)
  • Cache Voltage 1.15v
  • Input Voltage 1.60 - 1.70v
  • RAM Voltage 1.65v
  • VRM Phase on Extreme
  • CPU/RAM Over-current on 120%
  • CPU/RAM Phase on Asus Optimized
  • C-States/SpeedStep Fully Enabled
What I have tried:
  • Adjusting the voltages, including rolling with stock.
  • Ensuring UEFI is the latest and greatest
  • Re-seated waterblock a dozen times
  • Tried IC7 and AS5 - It appears to work wonders, then after a week or so issues persist? Not entirely sure if placebo.
  • Adjusted turbo parameters - Either it limits the turbo boost, or doesn't do anything.
  • Adjusting power delivery options, such as LLC and Phase control
  • Praying


The temps during gaming and general work load a fine, but that's SpeedStep doing it's thing. I only ever have issues when I am doing something CPU intensive. Rendering is a big no-no at this stage.



Any pointers?

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| 4790K 4.6Ghz @ 1.15v / Uncore @ 4.6Ghz | Avexir 16GB 2133Mhz CL9 | Asus Maximums VII Formula |
| Gigabyte G1 980 GTX | NZXT S340 | Corsair H110i GTX |



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Old 13-06-18, 10:36 AM
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AlienALX AlienALX is offline
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The weather is a big factor. I am now running 18c hotter than I had been for months.

Have you delidded it? maybe now is the time....
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Old 13-06-18, 10:47 AM
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Quote:
Originally Posted by AlienALX View Post
The weather is a big factor. I am now running 18c hotter than I had been for months.

Have you delidded it? maybe now is the time....

So this happens in the Winter too! I have thought about jacking in water cooling for something like a NH-D14, just to see if that has the same issue. I know the S340 is a bad case in terms of thermals. So I have thought about switching back to the Air 540 (if I can find it)



I have thought about de-lidding. But don't have the tools to do so. I do wonder if the thermal paste between the core and the IHS is degraded somewhat. I've been reading people running the H110i GTX with a vcore of something like 1.28v and still getting respectable temperatures.
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Old 13-06-18, 10:49 AM
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If you overclock hard then the thermal paste will degrade, yes. Maybe it is time to buy the tools to delid with? because tbh that sounds a lot cheaper than buying a NH-D14 for example.

TBH? I would have done it on day one.
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Old 13-06-18, 10:54 AM
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Quote:
Originally Posted by AlienALX View Post
If you overclock hard then the thermal paste will degrade, yes. Maybe it is time to buy the tools to delid with? because tbh that sounds a lot cheaper than buying a NH-D14 for example.

TBH? I would have done it on day one.

Yeah, may have to have a think about that. Though, this chip has never been seen voltages past 1.25v and hasn't been pushed too hard I would say. But then I do have a golden chip and does deserve it



Come to think of it, my thermals have always been quite on the high side. Will take a look at some delid tools.
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| Gigabyte G1 980 GTX | NZXT S340 | Corsair H110i GTX |



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Old 13-06-18, 11:08 AM
Warchild Warchild is online now
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Well I learned that my Bitspower waterblock wasn't seated perfectly on my CPU. Resulted in 20C hotter than necessary. The CPU cage was bent slightly so lifted the north side up. I filed it down and now the block sits properly on the processor.

The terrible part about Intel IHS is that it is concave instead of convex for some dumb reason. At least AMD got that part right!

Lapping the IHS could help you alot if you want proper contact. I would also Delid. 4790k is perfect candidate for it.

Slap some Metal Tim on die then some krynaut or thermal paste between your IHS and AIO.
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Old 13-06-18, 11:27 AM
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Thanks for the advice chaps. Doing a delid is certainly something to consider.



With work and having a child I don't get much free time during the day, so I may send my 4790K off to have this done:


https://www.ebay.co.uk/itm/DELID-REL...torefresh=true
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Old 13-06-18, 12:00 PM
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Quote:
Originally Posted by CalVic View Post
Thanks for the advice chaps. Doing a delid is certainly something to consider.



With work and having a child I don't get much free time during the day, so I may send my 4790K off to have this done:


https://www.ebay.co.uk/itm/DELID-REL...torefresh=true
Delidding is worth it, Temps are much lower now on my 8700K and I'd imagine you'd see quite a nice temp decrease on the 4790K too.
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Old 14-06-18, 01:59 AM
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Rather than using Adaptive Voltage try using an offset, adaptive V is known to cause alarmingly high spikes under heavy load. As far as I can see this is your issue with the huge rise in temps. I run my 4790K at 4.6Ghz 24/7 at +0.125 offset (1.225v) and rarely do I go over 60c with an ambient temp of 24c using the H100i v2.
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Old 14-06-18, 08:21 AM
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As Wraith said don't use Adaptive voltage when stressing CPU. It is highly not recommended. Input voltages manually. That should resolve overheating while on load. Delid could help in temperatures overall. I dropped 18 C on my 4790K with Noctua D14.
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