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How to lower voltage 4790K *temps high*?

Unseen

Unseen

Unseen

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Joined
5 Jul 2014
Posts
70
"ReVenge Gigabyte Z97" Intel Core i7 4790K @ up to 4.6GHz Configurable Enthusiast Gaming Bundle

Asetek 570LXL 240mm High Performance Liquid CPU Cooler - 1150

TeamGroup Vulcan ORANGE 16GB (2x8GB) DDR3 PC3-17100C11 2133MHz Dual Channel Kit (TLAED316G2133HC11ADC01)

Intel i7 4790K - 4.8GHz Binned

This was bought from Overclockers in February 2015, had issues ever since with game temperatures. I bought extra exhaust fans and never managed to fix the problem, reapplied thermal paste, resat the radiator, made sure the AIO liquid cooler was actually working. I just gave up in the end and learnt to accept that the 4790K runs hot and that my temperatures would always be higher until the day I upgrade. 25-30 idle temperatures which then creep up to 80-85C when gaming.

That was up until recently when I stumbled upon a forum post by another user on another forum with a 6700K talking about stock Intel voltage clocks and how they were ridiculously high causing huge temperature gains in his rig. So I did a little bit of digging and found that my max core voltage when in a video game is 1.231. At idle the core voltage says 0.803V through CPU-z, It does flutter around the 0.8 to 1.0 range with applications open.

I left everything in the BIOS at the default settings when it all arrived, not touched anything. Could somebody please help me fix this issue :). The cooler as far as I'm aware is still working, I have enough intake (3) and exhaust fans (3) inside the case. With the AIO and RAD also.

Desktop

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Game

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Unseen said:
How do I go about this and what about the core voltage does it need decreasing?
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if your cooling solution cannot keep a haswell 4c8t cpu under 65ish degrees during gaming with only 1.23 volts going through then either its a bad cooling solution or something is not working as intended. For reference i can pump 1.32v through my 4790k clocked at 4,8ghz and not hit 80 during gaming(stress testing is a different story) and thats using an air cooler, cryorig r1 ultimate with the bug standard thermal paste included in the cooler box..
 
I seem to have found the issue. It seems to be the case itself restricting outgoing airflow :(. http://www.overclockers.co.uk/showproduct.php?prodid=CA-151-NX I have taken the top panel off and the cpu temperatures are now down to 50-55c when gaming.

Would it be safe to leave the panel off for a while? I may also look into buying a new case in the near future any ideas?

As for increasing the Pump / fan speeds it was too way too confusing to follow with tutorials.
 
Unseen said:
I may also look into buying a new case in the near future any ideas?
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Here's a few with good airflow (the new Silverstone SST-PM02B-G being the exception in the list, with less ventilation at the front, but is still decent according to reviews, certainly better than the H440):

My basket at Overclockers UK:
Total: £558.92 (includes shipping: £23.10)
​

The Corsair 400C has gained some fame as one of the few cases with totally closed front panel that got the ventilation on the sides just right, and airflow is still very good, if you like the clean front look. Cases from Fractal Design which carry that same closed front design also tend to be good in that sense, with enough side venting.

If you are going to keep using the 240mm AIO I'd probably go for the Meshify C or Primera SST-PM02B-G, so you can keep their three intake fans at the front, and mount the AIO at the top. Hmm, on closer inspection, all those cases allow for a top 240mm.

There are so many cases it's probably best to choose a couple you like and then ask how they are for airflow etc.
 
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1.231V @ 4.8Ghz is SPECTACULAR for a 4790K. The voltage is not your problem. You likely have pump speed and airflow problems. Use google, figure out how to speed them up.
Also if you didn't remove and reapply thermal paste properly, or if you used crap paste, that might be part of your problem. Kryonaut Thermal Grizzly is the best paste you can get atm without moving up to the "liquid metal" type stuff which is exclusively for use by experts. Don't mess with that stuff.
 
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