I7 6700K Oc Issue

[zicu111]

Hello. So, i've upgraded my pc to the next configuration: cpu i7 6700k + cooler Scythe Ninja 4, Asrock z170 pro4s motherboard, gpu card gtx 1070 and 16gb ddr4. I started to OC my cpu to see if i can make it stable at 4.5ghz, because that's the point where i want to keep it. I stabilized it at 4.5ghz(45x100mhz), all core option in bios, at 1.32V and LLC Level 3 (on Level 1&2 it wasn't stable, got blue screen for each). On idle when i turn on my pc, on cpu-z the voltage shows up 1.312V(even though on bios it's Core Voltage Manual set: 1.32V), and because of the LLC Level 3, in stress test with prime95 and aida64, after 10 minutes each, it was stable, but the voltage was 1.280V(with LLC Level 1 1.248V and with LLC Level 2 1.264V), temperatures were pretty fine, 75 celsius degrees in stress. Everything was good, but after 1 hour since i ran the tests, when i was in desktop just doing some ordinary things, nothing to use the cpu even at 10%, i got a blue screen and restart. I said, ok, let's get down to 4.4ghz( i didn't wanted to raise the voltage to see if it will be stable), i set the voltage to 1.30V same LLC Level 3 (again with Level 2 and 1 it didn't worked, blue screen), and again it passed the stress tests, and, after 30 minutes, same thing in normal desktop, blue screen. I set it after to 4.3ghz at 1.28V Level 3 LLC, and for 3 days it was stable, no errors.
I want you to ask if it's possible to stabilize it at 4.5, what other things should i try? I have a friend with a better mobo, an Asus Maximus VIII Impact, and with MY CPU, it was stable at 4.5 @ 1.25V. So, it's because of my mobo? Is it capable only for 4.3ghz? If you have more questions, i am here to respond you all, thanks.

 

[The_Staplergun]

Don't exceed 80c when testing with prime95 version 26.6, and don't exceed 1.4 volts. Those are your operating perimeters.

80c at max load is ok, and you wont generally operate at those temps even under a regular load. Exceeding 80c for more than an oops moment isn't recommended. Don't freak out and turn the computer off, just stop the prime95 test. Cutting it off turns off the cooler too. Again, just stop the test, go back in, and tweak it a little.

1.4 volts is the recommended safe limit. Anything higher and you begin degrading the chip. Again, another oops moment. I highly recommend not operating AT 1.4, but you can go up to 1.4 just fine.

As long as you follow these guidelines as the most basic limits, you're gonna be alright.

 

[zicu111]

Ok then, I will try to raise the voltages when I have time, to see how the temps works out.

 

[The_Staplergun]

Yeah, not every chip is the same. Some run cool at high voltage, and some run hot at low. It's the silicone lottery.

If you hit the thermal limit, that's it. If you hit the voltage limit, that's it. Either that, or unstable. Whatever's stable inside those numbers is a good OC.

 

[mcnumpty23]

not sure i would want to go to 1.4v on Scythe Ninja 4

its an ok cooler but not top end

 

[The_Staplergun]

Well, that goes back to the thermal limits. You'll hit one of the three limits: Stability, Temp, or Voltage.

NOTE: DO NOT JUMP SETTINGS. Step up slowly. You don't just slam your chip at 1.4 volts and throw it in the grinder.

 

[zicu111]

I've raised the voltage from 1.32V to 1.35V, same LLC Level 3, and after prime&aida stress cpu test, all was good. My max temperature was 80 celsius degrees at 1 core, and 77 celsius degrees on the rest. I also played for 1 hour a game, and max temp was 72 celsius degrees. I guess it's ok, right?

 

[The_Staplergun]

Yes that's right at the limit.