Solved CPU multiplier Throttling down during stress test (i7 7700k)

April 2, 2017 at 17:10:43
Specs: Windows 10, 7700k
Hello all,

I can't find the root cause of this problem. I'll list my specs below as well as various screens. I have searched thoroughly online to no avail. I see similar issues, but the solutions that work for OP are things I've already tried etc.

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MSI Z170-A PRO (Bios 1.H0 - Latest version)

Intel i7 7700k @ 4.2GHz + H100i v2

16GB(8x2) Corsair Dominator 3200MHz

GTX 980Ti 6GB

Corsair HX850 PSU

1TB Samsung EVO840 SSD


So basically, once I set my CPU ratio to anything above 46, it will immediately throttle down to a 43 multiplier during stress testing. (confirmed to do this with P95 as well as OCCT)

Testing at 4.6 is perfectly fine & stable.

My voltages are set to auto, but I have manually increased incrementally with the same result.

The only settings I have not touched (because of a lack of understanding) are these:

Long/Short power limits (TDP - not sure how to translate to W safely, don't want to take risk)

CPU Ring ratio (left it at auto, seems to stay at 4200MHz)

***

I have tried to change CPU ratio mode (fixed/dynamic, same result)

Any help would be greatly appreciated! Thanks in advance!

pics of bios/testing:

https://ptpimg.me/62897r.jpg

https://ptpimg.me/5q000q.jpg

https://ptpimg.me/9d1v38.jpg

https://ptpimg.me/730nuw.jpg

https://ptpimg.me/2hmf10.jpg

message edited by staygold


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#1
April 3, 2017 at 06:57:52
✔ Best Answer
With OC'ing you need to set the VCore on manual or the MB will increase the voltage which is increasing your heat. Start with the same VCore that the auto sets at stock speeds and lock that down. On some chips you actually can go lower than stock voltages which will help you achieve higher OC. I have not OC this one but I think I have read that some start at 1.20V and see how high an OC they can get stable at the lower voltage. Then raise it only if needed for stability at higher speeds and then only in very small steps to keep it cooler running and longer life.

You have to be a little bit crazy to keep you from going insane.


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