OC 7700K case Windows 10 blue screen

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kinagiyuki

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Recently I have changed my cooler from air to h100i v2 and thought I could achieve a higher overclocking for my 7700k. But the fact is that, I overclocked to 5.0Ghz and always got blue screen when loading Windows if the Vcore was lower than 1.4V.

Then I set it to 1.42V and it could pass the AID64 stress test. However, if I started playing a high performance game, my computer crush and stack after playing the game a few minutes and I need to reboot it.

So I tuned back the frequency of my CPU to 4.8GHz and 1.25V that can stably run previously and also with AID64 stress test pass but when I do the XTU bench test, the Windows turned to blue screen again...

Here's my setup:
CPU: i7-7700k (4.8Ghz/1.25V or 5.0GHz/1.42V)
Cooler: Corsair H100i V2
Motherboard: ASUS Prime Z270-A
RAM: G-Skill Ripjaws V Series DDR4 3200MHz (XMP enabled)

And average temperature with 4.8GHz/1.25V is ~70 degree C when stress test.
Which value should I tune to prevent blue screen and game crush?

Edit:
My PSU: Cooler Master V1000
 
Solution
Phaaze88
It's just a matter of Asus being 'slower'... there's only SO many different ram modules to test, whereas G. Skill has a 'few' motherboards to go over.

This takes us back to the cpu OC. Start at 1.35v at say, 4.7ghz, and go up in frequency from there. No higher than 5ghz. Should it crash, bump up the voltage in small increments of 0.01, and don't exceed 1.4v - run tests at each 'bump'.

Also, consider running memtest, as there's the possibility one of your sticks is/has gone bad.
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Phaaze88

Phaaze88

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Well, if it's crashing period, then it's not a stable overclock. But it may not be cpu at fault.
Is your ram listed on your motherboard's QVL(qualified vendors list)? If not, it's likely the source of the problem. You can find out either in the mobo manual, or Asus' support site.
No real reason to take voltage over 1.4v, due to diminishing returns and risk of frying your cpu.
 
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kinagiyuki

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I am using G-Skill Ripjaws V Series DDR4 3200MHz and its part number is F4-3200C16D-16GVK that is not supported in QVL so should I disable XMP?
 
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Phaaze88

Phaaze88

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Yes. Please check either your motherboard manual or Asus' support site(should have a more up-to-date list) for the QVL(qualified vendors list). It's a chart displaying tested compatible ram modules. If yours is not listed, it's likely that it is the cause of the problem.
 
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kinagiyuki

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My RAM is G-Skill Ripjaws V Series F4-3200C16D-32GVK DDR4 3200MHz 32GB and it is not in the QVL list.....so I will try disable XMP and see if it works...
 
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Phaaze88

Phaaze88

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It should stabilize your system. But if you want to use X.M.P., it's best if you pick your ram from that list.
 
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kinagiyuki

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Wait a moment.....although I cannot find my RAM in prime z270-a QVL, I find it in G.Skill official webpage that it says F4-3200C16D-32GVK does support and in QVL list of prime z270-a...... It really confuses me...
 
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Phaaze88

Phaaze88

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It's just a matter of Asus being 'slower'... there's only SO many different ram modules to test, whereas G. Skill has a 'few' motherboards to go over.

This takes us back to the cpu OC. Start at 1.35v at say, 4.7ghz, and go up in frequency from there. No higher than 5ghz. Should it crash, bump up the voltage in small increments of 0.01, and don't exceed 1.4v - run tests at each 'bump'.

Also, consider running memtest, as there's the possibility one of your sticks is/has gone bad.
 
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Solution
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kinagiyuki

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It's Cooler Master V1000
 
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Phaaze88

Phaaze88

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Whoa. I'm assuming you're running an SLI/X-fire setup? Because that unit is a massive waste if you're just on a single card...
 
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kinagiyuki

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Haa, it's for my future upgrade or expansion. Maybe I would get one more GTX1080 Ti to try SLI
 
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mdd1963

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not every 7700K will hit 5 GHz...

Even 4.8 GHz is plenty, and 70C temps at that freq are good, with performance besting every other cpu out there, save for other 7700K samples running at 4.9 and 5.0, getting 2-3 more frames/sec or something above their monitor's refresh capabilities anyway....
 
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