cpu dips CPU usage dips

[SirPirate]

Massive cpu dips while playing GTA 5.
Power settings and temps in order.Never seen cpu usage like that before.Ideas?
Recently upgraded to this i5, replaced the fan and power delivery daughter board as they were faulty.I doubt this has much to do with the issue as I was getting 40ish fps with these upgrades/ repairs and the issue started after multiple weeks of gaming.The game is running at 20fps or lower so its pretty much unplayable.
Specs:
Inspiron n5110
i5 2520m
6gb 1333 ram
Nvidia 525m
240gb ssd
win 10 64bit
 

[Kilrah]

Any actual problem? Maybe the game just doesn't need more at those times.

[SirPirate]

Just now, Kilrah said:

Any actual problem? Maybe the game just doesn't need more at those times.

Yeah, dips the fps from 40ish to 20 and under.(sorry, could have been more precise)

[boggy77]

7 minutes ago, SirPirate said:

Yeah, dips the fps from 40ish to 20 and under.(sorry, could have been more precise)

looks like thermal throttling.

[SirPirate]

11 minutes ago, boggy77 said:

looks like thermal throttling.

Would it not cut the turbo boost first and then lower clock speed?
I ran it on the bed just to starve it for air and it still did ok I think.

[unclewebb]

Lots of Dell laptops from this era have severe throttling problems due to clock modulation.  This can slow the CPU down internally.  It is common to see back and forth variations from running like a slug to running fine at full speed.

 

Try running ThrottleStop. 

https://www.techpowerup.com/download/techpowerup-throttlestop/

 

Take a screenshot of ThrottleStop while your CPU is loaded and running at low MHz.  Better yet, go in the Options window, turn on Nvidia monitoring, go back out to the main screen, turn on the Log File option and go play a game.  After 15 minutes or however long it takes, exit your game and then exit ThrottleStop so it can finalize your log file.  Look in the ThrottleStop/Logs directory.  You can attach the log file here or copy and paste the data to www.pastebin.com

 

 

The two columns in the middle, Mod and Chip, represent the two different types of clock modulation throttling that Dell frequently used.  Both of these columns should always show 100.0 for each thread.  Check this data while throttling is in progress.  Anything less than 100.0 is a problem.  Post a screenshot of ThrottleStop so I can show you what needs to be checked to try and fix this problem.

[SirPirate]

37 minutes ago, unclewebb said:

Lots of Dell laptops from this era have severe throttling problems due to clock modulation.  This can slow the CPU down internally.  It is common to see back and forth variations from running like a slug to running fine at full speed.

 

Try running ThrottleStop. 

https://www.techpowerup.com/download/techpowerup-throttlestop/

 

Take a screenshot of ThrottleStop while your CPU is loaded and running at low MHz.  Better yet, go in the Options window, turn on Nvidia monitoring, go back out to the main screen, turn on the Log File option and go play a game.  After 15 minutes or however long it takes, exit your game and then exit ThrottleStop so it can finalize your log file.  Look in the ThrottleStop/Logs directory.  You can attach the log file here or copy and paste the data to www.pastebin.com

 

 

The two columns in the middle, Mod and Chip, represent the two different types of clock modulation throttling that Dell frequently used.  Both of these columns should always show 100.0 for each thread.  Check this data while throttling is in progress.  Anything less than 100.0 is a problem.

 

 

 

 

https://pastebin.com/CpkJaLXS
So the tldr of my experimenting is that mod and chip values were locked at 100, clock dips were from 3ghz to 800mhz and at regular intervals.I haven't done any loging with ts before so I hope what I did is useful in some way.

[unclewebb]

Your Nvidia GPU is at 91°C.  That is probably what is triggering the CPU throttling.  You might be able to prevent CPU throttling by clearing the BD PROCHOT box in ThrottleStop.  You should also check the Set Multiplier box and click on the Turn On button.

 

Ultimately, you have to disassemble your laptop and try to improve your Nvidia GPU cooling.  Try replacing the thermal paste with something better.  Maybe you can under volt your Nvidia GPU by using MSI Afterburner.

 

Edit - Your log file shows the Nvidia GPU hitting 97°C and 98°C when CPU throttling hits.  This is definitely the problem.

[SirPirate]

13 minutes ago, unclewebb said:

Your Nvidia GPU is at 91°C.  That is probably what is triggering the CPU throttling.  You might be able to prevent CPU throttling by clearing the BD PROCHOT box in ThrottleStop.  You should also check the Set Multiplier box and click on the Turn On button.

 

Ultimately, you have to disassemble your laptop and try to improve your Nvidia GPU cooling.  Try replacing the thermal paste with something better.  Maybe you can under volt your Nvidia GPU by using MSI Afterburner.

 

Edit - Your log file shows the Nvidia GPU hitting 97°C and 98°C when CPU throttling hits.  This is definitely the problem.

Retested again with bd prochot off and it died out at 99C at the gpu, I agree with you 1000%.
Im gonna take your suggestion and try to under volt it for now and Im gonna look at liquid metal later on.I think the issue stems from the upgrade from the pentium b960 to the i5.It's probably overwhelming the cooler.In any case, thank you very very much for showing me the light, its very much appreciated!