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PC Processors

WishUponACupOfTea
Journeyman III

Strange CPU throttling on 7945HX Laptop

My Zephyrus Duo 4090 with an R9 7945XHX and 4090 Laptop GPU is having a strange problem with CPU throttling. After playing some games or doing benchmarks such as 3DMark Time Spy, my CPU clock and voltage throttles down to a fraction of when I start playing. The throttle only goes away when I reboot. Here is how simple it is to reproduce the throttling:

  1. Freshly rebooted, start Time Spy and do a normal run. My score is normal. My CPU and GPU temperatures never go above 85C, so I ruled out thermal throttling.

  2. Now my CPU is throttled. The max core clock is now at around 3500 Mhz out of the expected 4800 - 5200 Mhz. And the max voltage is 0.7V out of the expected 1.2V.

  3. Running Time Spy again will give me a greatly reduced score. My CPU score has dropped from 14K expected to around 10.5K. Cinebench shows me a similar drop in performance. From my expected 35K to around 22K.

My Google-fu has not helped me with this and I tried everything I could think of. Windows power options, UXTU, ASUS Armory Crate options, nothing has helped. The only way to get rid of the throttle is to reboot and it just starts all over again. What could be the cause of this?

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6 Replies
paul17041993
Adept III

try disabling the nvidia GPU in device manager after running time spy, if it stops throttling then there might be something fishy with the internal power delivery

 

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mirov84
Adept I

Hi,were you able to solve this issue, i have similar issue with my Alienware m16 r1 with ryzen 9 7945hx, random cpu drops while gaming to 32.3 watts even if temperature is limited to 85c using custom preset. And even hwinfo shows that vrm temperature is low, so as you mentioned a restart most of the time helps, I appreciate if you share with me any update or solution you reached. Regards

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mirov84, please open a new thread listing all your parts. Thanks, John.

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misterj
Big Boss

WishUponACupOfTea, please try removing Armory Crate or any other third party applications saying they will improve your performance and let us know if that helps. Thanks and enjoy, John.

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Thanks for replying, its an Alienware so Alienware command center is the performance control application, removing it doesn't help much. Asus at least has the g helperm

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name2142
Journeyman III

 

Hi, i have laptop Asus ROG g713p - amd 7845 hx / RTX4070 / 32Gb

I also have problems with this processor.
After 10 minutes of playing, all indicators drop to almost 0.
After the first drop, it repeats every minute.

Untitled.jpg

 

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