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4670K running hot and not stable

Tags:
  • CPUs
  • Turbo Boost
  • Temperature
Last response: in CPUs
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June 29, 2014 8:16:42 PM

Hi folks.
I bought a new CPU, 4670K, and MB, Maximus VI Impact, this week.
When running o stock clock and with Turbo Boost I'm getting horrible temperatures when running IntelBurnTest or Prime, over 90º. I've saw that the VCORE goes over 1.25V on Turbo Boost and that's probably why It gets so hot.

I've tried working on VCORE and clocks to get a good over with a decent temperature, but It ain't working.

The lowest I'm getting at the moment is keeping it at 3.8 and with VCORE at 1,14. It's stable at this config and temps won't pass 85º. Again, I'm aware that this is not a good temperature, since I'm using a H100 with 2 NOCTUAs on it.
Tried changing the thermal past twice and all, but the temps stay the same.
On "Idle" it stays at 40º C or so, but on full load it goes to 84º on one core, while the lowest stay at 71º or so.

The question is:
What BIOS settings I can change to make it stay cooler? Is there a way to change other settings to be able to lower my VCORE and stay stable? I'm asking this since Turbo Boost get's so unecessary VCORE, maybe other AUTO SETTINGS are pushing the temp without need. Or, should i RMA this CPU?

The current build is the following:
i5 4670K @ 3.8Ghz with 1.14 VCORE (Other settings on AUTO) (H100 with 2 Noctuas on pull)
ASUS Maximus VI Impact (Last BIOS)
2x4GB Corsair Dominator GT at 2000Mhz (They are 2000Mhz)
PSU XFX850 Pro Black Edition
128GB Vertex 4 + 1TB SATA II Samsung HDD
Corsair 650D case with 2 Noctua fans, front 140mm push and 120mm on the back on pull (I know, funny to use a MITX on that tower, but I'll change soon)

Thanks a lot!

More about : 4670k running hot stable

a c 76 à CPUs
June 29, 2014 8:27:08 PM

take the cpu cooler out and reapply new thermal paste.

Are you putting in the thermal paste properly? I suggest watching a video on how to do it.

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June 29, 2014 8:38:30 PM

I am. Used the "rice dot" twice, but no temperatures change. Using MX-4, by the way.
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a b à CPUs
June 29, 2014 8:53:09 PM

Well I don't know the default voltage for that system or the average temps should be, but yes that is quite high.

Thermal paste might be something to consider, what kind are you using and how are you putting it on?

I could be wrong, but I thought that 1.25v was the max voltage typically that you should ever push an a Haswell chip even when overclocking. Haswell chips tend to run a fair bit hotter than Ivy Bridge but that is still too high. You could look and try and ensure the onboard graphics are deactivated as this would save you a little thermal head room.

You should also check for a BIOS update, because like you I don't think the turbo speed should be using that much voltage, and the motherboard has a lot of control over that. If all else fails you should be able to disable Turbo Boost onboard. On my P8Z77-V Pro under CPU options, not on the overclocking panel but the motherboard settings panel, there is an option to disable turbo core and to enable overclocking by adjusting the CPU multiplier directly. This could be a better way for you to go, as it would allow you to slowly push the clock speed up and the voltage up.

You might want to consider returning the part, but again the way this looks it could be either CPU or Motherboard and it is hard to tell which is the bad part.
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a b à CPUs
June 29, 2014 9:37:30 PM

Is the water pump running?

Are the air fans running?

Is the cooler oriented right? One guy had his rotated 90 degrees and had results like yours.
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June 29, 2014 9:46:16 PM

Tried applying MX-4 paste again and looks like I'm not passing 70º at 3.8Ghz @ 1.14
Trying to stay at 4.0 or 4.2 now. What max temp on IntelBurnTest is safe?
The pump is running fine, at 2000+ RPM. The air fans are running fine too. The orientation is the radiator and both fans on top, pulling the air trough radiator and taking it outside the case. Front and back fan of the case pushing air inside, while the radiator ones take the air outside.
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a b à CPUs
June 29, 2014 9:48:12 PM

I mean the cooler plate on the CPU was rotated 90 degrees.
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June 29, 2014 10:38:42 PM

4.2GHZ looks stable at 1.23, but getting 84º max on IBT
Is it safe or should i underclock?
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a b à CPUs
June 29, 2014 11:00:09 PM

Looks like you lost the silicon lottery. You seem to be a real good candidate for delidding. Check it out on UTUBE.
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June 29, 2014 11:02:46 PM

Yeah, no luck at all :( 
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