Question CPU speed stuck at 800MHz in BIOS/0.79GHz in Task Manager

Jun 6, 2020
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Hi there,

I've a new-build PC and the CPU speed is stuck at 800MHz and will not go any higher or any lower. It reads 800MHz in BIOS and 0.79GHz in Task Manager, despite TM listing the base speed as 3.60GHZ.

I've run a fresh install of Windows 10 but the problem still appears then as well. Interestingly, if I boot into Safe Mode then the full 3.60GHz appears in Task Manager.

I've also updated BIOS to its latest version which hasn't helped and neither does changing any settings within BIOS itself.

Here's the specs of my build:
Intel i7-9700k 3.60GHz
ASUS ROG STRIX Z390-H Gaming motherboard
Nvidia RTX 2070 Super Ventus
16GB DDR4 RAM
250GB M.2 Drive
Corsair H80i V2 liquid cooling fan

I haven't overclocked anything or even attempted to overclock anything. The motherboard temperature lists at 27 Celsius and the CPU itself at 32 Celsius.

I'd really appreciate any advice or help you can give, it's driving me nuts!

Cheers.
 
Jun 6, 2020
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10
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Jun 6, 2020
6
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10
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You have to either load BIOS defaults or go to CPU setting in BIOS and adjust the multiplier in there from 8 to... say 47. And enjoy.
Everything is set to ‘Auto’ and greyed out so I can’t change anything sadly.

I installed Throttlestop out of interest to see if that would help anything. When I unchecked the ‘BD PROCHOT’ setting, the clock speed kicked into life and started fluctuating between 3.6GHZ and 4.2GHz, seemingly overriding the issue.

Does anyone know what this setting relates to and how I might be able to fix it so I don’t need to use Throttlestop?

Thanks.
 

vov4ik_il

Prominent
Mar 23, 2020
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That setting supposed to throttle down you CPU when other stuff gets too hot (GPU, VRM, other components). What are other board temperatures? Look for an answer in that direction...
 

vov4ik_il

Prominent
Mar 23, 2020
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I flashed it to the latest version this morning, it was released two weeks ago.

At least I've found a workaround for it at the moment, I'm just intrigued as to what's causing it to throttle all the time.
You could disable this feature in BIOS completely or contact CS about the motherboard.
 

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