4790K Baking Extraordinaire

CalVic

CalVic

Member
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?
 
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....
 
AlienALX said:
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....
Click to expand...


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.
 
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.
 
AlienALX said:
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.
Click to expand...


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.
 
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.
 
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.
 
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.
 
Yeah, I'm well aware of the issues that adaptive brings. I've tried offset and manual mode and the heat issues persist. Will give it another shot though...


I stressed with manual and even at 1.15v it shot straight to 90s.



The S340 is not a case for watercooling. I wish my parents didn't throw out my AIR 540 with pretty much brand new custom loop in.


I think because I have decent 4790k, I think a delid and a NH-14 will surface. Will need a new case as I don't think the S340 will support the NH-14... Sigh.
 
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CalVic said:
Yeah, I'm well aware of the issues that adaptive brings. I've tried offset and manual mode and the heat issues persist. Will give it another shot though...


I stressed with manual and even at 1.15v it shot straight to 90s.



The S340 is case for watercooling. I wish my parents didn't throw out my AIR 540 with pretty much brand new custom loop in.


I think because I have decent 4790k, I think a delid and a NH-14 will surface. Will need a new case as I don't think the S340 will support the NH-14... Sigh.
Click to expand...

The weather is causing loads of this. I am 45, and I tell you what the last few summers have been roasting. As hot as the 70s and early 80s.

That crap really takes its toll on computer parts and anything that gets even remotely hot. As I sit here my water temp on my 10 core BE Xeon and Fury X is 29c. Two months ago? it was 31c under full load after about three hours. Now? it goes into the 40s.
 
Something to consider - though my water temp at the moment is 25.4c. I've had this issue throughout winter. Just that I couldn't be bothered to see what's what. Then a few days ago I realized that actually I had exhausted the tips and tricks of what I know.


Edit: House is in the shade, so ambient temps aren't too bad.



Looking at the NH-D15, it looks as if it will fit. Albeit tight. Will have to see if that is on par with the H110i GTX.
 
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Those chips were always hot SOBs. And it was compounded even more so by the toothpaste Intel used. I'm amazed you didn't delid it ages ago fella.

BTW? that £30 deal is pretty darn good tbh. The heat spreader is about a tenner, plus you would have to buy liquid metal which ain't cheap either, then the tool.
 
AlienALX said:
Those chips were always hot SOBs. And it was compounded even more so by the toothpaste Intel used. I'm amazed you didn't delid it ages ago fella.

BTW? that £30 deal is pretty darn good tbh. The heat spreader is about a tenner, plus you would have to buy liquid metal which ain't cheap either, then the tool.
Click to expand...


Yeah - I'm surprised too. To be fair, I haven't been into hardware like I was a few years a go. Mrs, kids, work and other hobby ventures do that ;)



Though I am starting to get back into it again after tinkering with my overclock, especially the 980 that I have running at 1500/7950Mhz. Would have more headroom but the S340 with the H110 as intake is killing airflow. I have remounted the top exhaust as intake.



Will certainly have my 4790k off for a delid service when I am next onsite somewhere around the UK with work. Gotta love being a penetration tester...




Oh the days of running 24/7 5+Ghz on my 8350... Now I am eco-freak with C-States and SpeedStep LOL.
 
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It's not so much eco freak, but more overclocking properly and skilfully. It's easy to turn them off and throw loads of power into a CPU, but harder to get it running properly with them on.
 
A de-lid is pretty much essential I found on the 4790K, mine went from the 90's down to the low 60's high 50's, on a H100i.

On my 7700K they went from high 60's and 70's to the low to mid 50's, on a NH-D15 not quite the drops I saw on the 4790K.

The CPU's were set to Auto Voltage in the Bios and they were getting around the 1.215v being put them with XMP and Multicore Enhancement enabled.

Now that it's warmer outside and the ambient temp's are rising in the room, my average ambient temp at the moment is between 30c and 36c and my CPU hit's high 60's under a H100i, but I am changing my case today so will see what happens.
 
AlienALX said:
Those chips were always hot SOBs. And it was compounded even more so by the toothpaste Intel used. I'm amazed you didn't delid it ages ago fella.

BTW? that £30 deal is pretty darn good tbh. The heat spreader is about a tenner, plus you would have to buy liquid metal which ain't cheap either, then the tool.
Click to expand...

Dont need the tool at all.

And anyway. Even if he lived in Dubai, the temp should not be hitting the 90s when stress testing.

I think people are missing the basic point here. If an AIO cooler is being used, even accounting for ridiculous ambient temperatures, it should not be spiking that high. My 4790k is not hitting that temp at the moment in Norway during our 30C temperatures, and I am using an old 3570k Intel cooler. As crappy as they come. My temp hits 80C with that POS.

Calvic,

What about posting screenshots of all your bios config ? perhaps some eagle eyed user here will spot something missed?
 
Warchild said:
Dont need the tool at all.

And anyway. Even if he lived in Dubai, the temp should not be hitting the 90s when stress testing.

I think people are missing the basic point here. If an AIO cooler is being used, even accounting for ridiculous ambient temperatures, it should not be spiking that high. My 4790k is not hitting that temp at the moment in Norway during our 30C temperatures, and I am using an old 3570k Intel cooler. As crappy as they come. My temp hits 80C with that POS.

Calvic,

What about posting screenshots of all your bios config ? perhaps some eagle eyed user here will spot something missed?
Click to expand...

I haven't missed the point it was me who told him to delid and me who told him his thermal paste may have deteriorated due to heat from constant overclocking :)

I have an article written by the guy who used to live in Taiwan (my pal) I will upload it when I get back home. In it he talks about the perils of heat and humidity.

However, I am not saying that that is the cause for this temp spike. It just doesn't help any one.
 
Sure, I'll get some screenshots uploaded when I've finished working :)
That'll also include screenies of H.264 encoding via RealBench with manual voltage set. This is what kills my system at the moment, not even using synthetic stressing.



Currently, I have IC7 applied as TIM. The mount is good considering two cores are practically the same and the others are approx 1 to 2c difference.
 
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