Max OC on 4790K

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bladerrider

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Jan 13, 2016
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Hello
I am trying to get some info on what is the max we can OC a 4790K on AIO cooler like H80iV2 or H100i? currently I am running my 4790k at 4.7 at 1.248V on air cooler. Idle is at 38 deg C range and Max load got to 70 during Cinabench test. i will be installing a H80i V2 today, and wanted to get this info.
what voltage and Core Multiplier I can run ? can i get to 5 Ghertz? the only games I play iRacing which uses only 2 cores, and asseto corsa which uses 2 as well.
Lastly how do I find out what voltage to run? and what is safe?
I have now changed the voltage when I went from 4.5 ghertz to the 4.7 OC. still at 1.248v at what increments to go up in voltage?
 
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Barney6262

Barney6262

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Oct 20, 2013
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Depends on your specific chip. Each chip is different.

Generally AIO water cooling makes minimal difference compared to decent air coolers.

Just start at the base voltage and keep increasing it along with clock speed until your temperatures become too high. Then, after you have run stability tests, dial back the clock speed a bit to ensure stability.
 
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Seanie280672

Seanie280672

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Mar 19, 2017
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Just keep pushing it, no one can tell you what the max is you will get as every CPU is different.

You are basically at 1.25v now, temps look quite good, dont go any higher than 1.35v, but remember, more voltage and faster cores means more heat, dont exceed 80oC - 85oC under full load, test with prime95 or a quick run of IBT (Intel Burn in Test) 50 standard passes takes 10 mins and is a good idea of stability, games alone are not enough to test for stability, you will find Windows starts failing and you are having to re-install everything every 3 months if your system is unstable.
 
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Barty1884

Barty1884

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Apr 16, 2015
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Max voltage is fairly generally accepted to be <1.325-1.35V depending on who you ask.

Can you get to 5GHz? Depends on the luck of the draw. When DC released, Intel made it sound like it should be possible - in actuality, the vast majority of people capped out at 4.8GHz, sometimes 4.9GHz.

AIO liquid cooling can starve your VRMs of required cooling at higher voltages - so you might run into some instability there if you have to push your voltages up.

The H80iV2 and a H100i are comparing different animals. An H100i should be the better cooling every time.
 
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Barney6262

Barney6262

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Oct 20, 2013
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The thing with AIO coolers is their radiator size. Most of them have similar or slightly larger surface area for cooling compared to air coolers. Not enough to make a real difference.

Temps will go up more slowly as the liquid can absorb more thermal energy before heating up (Compared to metal in aircoolers) but over time this won't matter as what effects thermal equilibrium is cooling surface area.
 
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