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Author Topic: Gaming 7 - All four 6600k cores stuck at 0.80 GHz  (Read 11707 times)

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pittoorsTopic starter

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Gaming 7 - All four 6600k cores stuck at 0.80 GHz
« on: 04-January-16, 02:35:19 »

To start off, I did read the thread (https://forum-en.msi.com/index.php?topic=261167.0) regarding this issue, and followed suggestions (bios + CMOS) accordingly. But I also noticed that the poster of that topic never seemed to find a solution, or simply never posted about it.

Now, to continue with a description of my issue; Since December 2015 I own a Z170A GAMING M7, and hooked it up with a i5 6600K. All seemed to be running fine for quite a while. Recently I noticed that all cores were stuck at 0.80 GHz. Resetting the bios, clearing CMOS (yes, I know the famous "how to reset the CMOS" link), updating the bios, down grading the bios,... I'm still stuck with 0.80 GHz on all four cores of the CPU.

Used programs to display the CPU core speed are Intel Extreme Tuning Utility, AIDA, and CPU-Z. 

To take take things to a basic level, I use default bios settings under version 1.8, which always worked just fine.

AIDA
CPUID CPU Name : Intel(R) Core(TM) i5-6600K CPU @ 3.50GHz
CPU Clock : 802.0 MHz (oroginal: 3500 MHz)
CPU Multiplier : 8x
North Bridge Clock : 802.0 MHz
Memory Bus : 1069.0 MHz
DRAM:FB Ratio : 32:3 

Should the multiplier run on 8x? It seems to be a bit strange to me, and I can't seem to get it higher than that.

Many thanks in advance for any suggestions that can point me into the right direction. It's highly appreciated. :biggthumbsup:
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pittoorsTopic starter

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Re: Gaming 7 - All four 6600k cores stuck at 0.80 GHz
« Reply #1 on: 04-January-16, 02:54:55 »

Okay, I think I may have found a solution that could help victims with similar issues. I'm not 100% sure what solved the issue but here is what I did, in this specific order:

  • Clear CMOS (I used the button on the back, and also removed the battery for a minute after that)
  • Reload bios version 1.8 to the motherboard
  • Shut down the computer
  • Switch the Slow Mode switch on the motherboard to the ON position (with the Gaming 7 you'll find it left of the on-board power button)
  • Start up your computer and go into the bios
  • Save your settings (even if nothing was changed)
  • Shut down the computer again
  • Return the Slow Mode switch to the OFF position
  • Start up the computer and let it boot into your OS (Windows 10 in my case)

I have no idea if the order is important of the above, but it worked for me.

I hope this helps some poor individual from a slow and agonizing death.
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darkhawk

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Re: Gaming 7 - All four 6600k cores stuck at 0.80 GHz
« Reply #2 on: 04-January-16, 03:39:09 »

The slow mode switch will make the computer run at 0.8 GHz, this way you can safely boot the computer without worry of harming the CPU.

By flipping the switch on and off, it might have reset whatever the issue was.

There's plenty of theories on why this is happening. But we (meaning users....) have not been able to figure out the exact issue or the best way to solve it.

What happens generally is it makes the computer think the CPU is overheating and causes it to throttle the CPU down. 

There's a few different ways to fix it. One way is to disable the thermal throttling within the BIOS.
Another way to fix it, supposedly (I cannot verify this myself, but it's worked for others) is to enable O.C. Genie, even if you aren't going to overclock at all and leave it at stock settings.

To muddy things even more, I personally think that the switches are most likely of poor quality and failing (even on a new motherboard) and causing the computer to think you've turned on slow mode. 

Anyway.....If everything appears to be working fine now, that's what matters. :)
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hapkiman

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Re: Gaming 7 - All four 6600k cores stuck at 0.80 GHz
« Reply #3 on: 04-January-16, 06:59:54 »

Also you can go into BIOS and Disable EIST.  This is Intel Speed Step.  Your processor will then run constantly at 3.5GHz.




Just FYI if you set Enhanced Turbo (right below EIST) to ENABLED (not Auto) your processor will run constantly at 3.9GHz (leave EIST Disabled if you do this).  If you want to OC back to what you had - leave Enhanced Turbo alone and just disable EIST.
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:lol_anim: i7-7700k @ 4.2GHz - MSI Z170A Gaming M7 - Corsair Air 540 w/4x140mm - Corsair H115i- MSI GTX 1080 Gaming Z 8G - 16GB (2x8GB) Corsair Vengeance 3000MHz DDR4 - HP BDROM- Samsung NVMe 950 Pro M.2 512GB (Boot) - Samsung 840 EVO 250GB - WDHDD 1TB -Seasonic Platinum XP2 860w - Samsung 22" 1920x1080 - Dell P2715Q  27" UHD 3840x2160 @ 60Hz -Win10 Pro 64 bit

hapkiman

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Re: Gaming 7 - All four 6600k cores stuck at 0.80 GHz
« Reply #4 on: 04-January-16, 07:12:13 »

My i7 6700k is OC'ed to 4.5GHz and never dips below 4.2GHz with EIST Disabled and Enhanced Turbo Enabled.  

Sorry for double post.
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:lol_anim: i7-7700k @ 4.2GHz - MSI Z170A Gaming M7 - Corsair Air 540 w/4x140mm - Corsair H115i- MSI GTX 1080 Gaming Z 8G - 16GB (2x8GB) Corsair Vengeance 3000MHz DDR4 - HP BDROM- Samsung NVMe 950 Pro M.2 512GB (Boot) - Samsung 840 EVO 250GB - WDHDD 1TB -Seasonic Platinum XP2 860w - Samsung 22" 1920x1080 - Dell P2715Q  27" UHD 3840x2160 @ 60Hz -Win10 Pro 64 bit

pittoorsTopic starter

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Re: Gaming 7 - All four 6600k cores stuck at 0.80 GHz
« Reply #5 on: 07-January-16, 06:16:00 »

Thank you both (darkhawk  and hapkiman) for the feedback, it's highly appreciated.

I think darkhawk hits the spot regarding the switch resetting whatever the problem was. I'm not sure about the quality of the switch, but a closer (magnified) look at it doesn't seem to show any defects or quality issues. The motherboard itself, around the switch, seems fine too. I'm not going as far as to taking the switch itself apart. But, yes, I do believe the solution was to enable, then disable slow mode.

I'm currently running my i5 6600K at around 4.8GHz, and it seems to be stable with core temperatures staying around 70 degrees (Celsius) at a maximum load. The fans of my water cooler don't step up that much to keep current conditions stable, so I might push the CPU a bit further by increasing voltage. For now I am happy with the result. Let's hope the problem stays away.
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