• Welcome to TechPowerUp Forums, Guest! Please check out our forum guidelines for info related to our community.

HELP undervolting Lenovo Legion y540-81sx

Joined
Jan 25, 2021
Messages
9 (0.04/day)
System Name Lenovo Legion y540
Processor i7-9750h
Memory 16gb
Video Card(s) 1660ti
Storage 1tb
Display(s) 144gz
hi guys yesterday i was playing warzone when i found that my cpu was at 91c so i want to ask how to undervolt properly, here i let you my settings :)
(gpu also was at 87c) and vantage is bugged on my chasis so im not using it
i7-9750h
1660ti
16gb
1tb hdd
128 ssd
 

Attachments

  • Captura de pantalla 2021-07-25 005222.png
    Captura de pantalla 2021-07-25 005222.png
    270.2 KB · Views: 79
  • Captura de pantalla 2021-07-25 005238.png
    Captura de pantalla 2021-07-25 005238.png
    272 KB · Views: 93
  • Captura de pantalla 2021-07-25 005315.png
    Captura de pantalla 2021-07-25 005315.png
    153.3 KB · Views: 84
  • Captura de pantalla 2021-07-25 005400.png
    Captura de pantalla 2021-07-25 005400.png
    89.3 KB · Views: 87
Joined
Jun 22, 2021
Messages
45 (0.48/day)
System Name Lenovo ideapad s340 15iml 81NA
Processor i7 10510U
Motherboard -
Cooling single fan cooling system
Memory 20 GB DDR4 2666
Video Card(s) Nvidia Geforce MX230
Storage 1TB samsung MZLVB1T0HBLR-000L2
Display(s) 1080p display 60HZ
Case -
Audio Device(s) dual 2 watt speakers with dolby atmos
Power Supply 65 watt
Mouse Hp omen gaming mouse
Keyboard -
VR HMD -
Software Windows 11
Benchmark Scores Geekbench 5: single core: 1189 multicore : 3997 compute(OpenCL):10976
the undervolt is fine, reduce the short power and long power max to 80w , if it still overheats reduce it to 60 watts

i highly suggest repasting ur laptop too as lenovo uses crappy thermal paste , it will reduce temps significantly , i got a 10 degree reudce in temps just by repasting and without undervolting

and a cooling pad would improve performance sustained workloads such as gaming
 
Joined
Jul 25, 2006
Messages
8,957 (1.62/day)
Location
Nebraska, USA
System Name Brightworks Systems BWS-6 E-IV
Processor Intel Core i5-6600 @ 3.9GHz
Motherboard Gigabyte GA-Z170-HD3 Rev 1.0
Cooling Quality case, 2 x Fractal Design 140mm fans, stock CPU HSF
Memory 32GB (4 x 8GB) DDR4 3000 Corsair Vengeance
Video Card(s) EVGA GEForce GTX 1050Ti 4Gb GDDR5
Storage Samsung 850 Pro 256GB SSD, Samsung 860 Evo 500GB SSD
Display(s) Samsung S24E650BW LED x 2
Case Fractal Design Define R4
Power Supply EVGA Supernova 550W G2 Gold
Mouse Logitech M190
Keyboard Microsoft Wireless Comfort 5050
Software W10 Pro 64-bit
The highest temp I see in your screenshots is 64°C - which is not hot.

The specs state the maximum T-junction temp for the 9750h processor is 100°C. So where are you seeing 91°C?

And most importantly, is the system throttling due to heat? If not, I say leave it alone!
 

unclewebb

ThrottleStop & RealTemp Author
Joined
Jun 1, 2008
Messages
3,958 (0.81/day)
@frostriz - Download ThrottleStop 9.3 or 9.3.1. It has some useful new features. A minor memory leak that was in TS 9.0 was fixed.


Your undervolt settings are OK. There is probably no way to improve upon these settings without your CPU becoming unstable. If you ever get a BSOD, add some voltage to the CPU cache. Most 9750H are only 100% stable with the cache at -125 mV. Some are stable at -130 mV. Very few are 100% stable with the cache at -138.7 mV. Do a few TS Bench 960M tests at 8 or 10 Threads. Make sure it does not report any errors. If you are stable, leave it as is.

my cpu was at 91°C
That is a normal operating temperature for an Intel CPU. Any temperature under 100°C is OK. That is why Intel sets the default thermal throttling temperature to 100°C. Intel must have done lots of testing. They seem to be confident that their CPUs can run reliably at these high temperatures.

Lenovo ignored Intel's advice. They decided that 100°C is too high so they have lowered the thermal throttling temperature to a more conservative 94°C. Some engineer at Lenovo has made your CPU extra safe.

The new version of ThrottleStop has a feature in the Options window called PROCHOT Offset. If you do not see a lock icon near this setting, you can adjust the PROCHOT Offset value. This will change the thermal throttling temperature. Many laptops uses a PROCHOT Offset value of 3 so the CPU will start to thermal throttle at 97°C instead of the Intel recommended 100°C. Something new to play with. After you find a setting you like, you can use the Lock PROCHOT Offset option so this value does not change. Some Lenovo laptops are screwing around with this setting based on what power plan you are using. I frown on manufacturers doing stuff like this which is why I added the Lock option to ThrottleStop. :(

If some specific games are pushing your CPU up over 90°C and that does not make you feel comfortable, I would create a new TS profile and I would lower the turbo ratio limits. This will slow the CPU down so it puts out less heat. I prefer a hot and fast CPU but the slow down option is there if you need it.
 
Joined
Jan 25, 2021
Messages
9 (0.04/day)
System Name Lenovo Legion y540
Processor i7-9750h
Memory 16gb
Video Card(s) 1660ti
Storage 1tb
Display(s) 144gz
The highest temp I see in your screenshots is 64°C - which is not hot.

The specs state the maximum T-junction temp for the 9750h processor is 100°C. So where are you seeing 91°C?

And most importantly, is the system throttling due to heat? If not, I say leave it alone!
yes its throttling, but i told you yesterday i got them screenshots were the day after

the undervolt is fine, reduce the short power and long power max to 80w , if it still overheats reduce it to 60 watts

i highly suggest repasting ur laptop too as lenovo uses crappy thermal paste , it will reduce temps significantly , i got a 10 degree reudce in temps just by repasting and without undervolting

and a cooling pad would improve performance sustained workloads such as gaming
i have a cooling pad, one with 5 fans so i think it should work, but dude it annoys me that gpu is also hot and cpu also in a 30min game goes up to 94 and games can lose about 20-30 fps

i just want to play games with 5 fps less, and 20 degrees less

@frostriz - Download ThrottleStop 9.3 or 9.3.1. It has some useful new features. A minor memory leak that was in TS 9.0 was fixed.


Your undervolt settings are OK. There is probably no way to improve upon these settings without your CPU becoming unstable. If you ever get a BSOD, add some voltage to the CPU cache. Most 9750H are only 100% stable with the cache at -125 mV. Some are stable at -130 mV. Very few are 100% stable with the cache at -138.7 mV. Do a few TS Bench 960M tests at 8 or 10 Threads. Make sure it does not report any errors. If you are stable, leave it as is.


That is a normal operating temperature for an Intel CPU. Any temperature under 100°C is OK. That is why Intel sets the default thermal throttling temperature to 100°C. Intel must have done lots of testing. They seem to be confident that their CPUs can run reliably at these high temperatures.

Lenovo ignored Intel's advice. They decided that 100°C is too high so they have lowered the thermal throttling temperature to a more conservative 94°C. Some engineer at Lenovo has made your CPU extra safe.

The new version of ThrottleStop has a feature in the Options window called PROCHOT Offset. If you do not see a lock icon near this setting, you can adjust the PROCHOT Offset value. This will change the thermal throttling temperature. Many laptops uses a PROCHOT Offset value of 3 so the CPU will start to thermal throttle at 97°C instead of the Intel recommended 100°C. Something new to play with. After you find a setting you like, you can use the Lock PROCHOT Offset option so this value does not change. Some Lenovo laptops are screwing around with this setting based on what power plan you are using. I frown on manufacturers doing stuff like this which is why I added the Lock option to ThrottleStop. :(

If some specific games are pushing your CPU up over 90°C and that does not make you feel comfortable, I would create a new TS profile and I would lower the turbo ratio limits. This will slow the CPU down so it puts out less heat. I prefer a hot and fast CPU but the slow down option is there if you need it.

yes its throttling, but i told you yesterday i got them screenshots were the day after


i have a cooling pad, one with 5 fans so i think it should work, but dude it annoys me that gpu is also hot and cpu also in a 30min game goes up to 94 and games can lose about 20-30 fps

i just want to play games with 5 fps less, and 20 degrees less
3.4ghz is the max in the benchmark
 

Attachments

  • Captura de pantalla 2021-07-25 204845.png
    Captura de pantalla 2021-07-25 204845.png
    217.1 KB · Views: 31

unclewebb

ThrottleStop & RealTemp Author
Joined
Jun 1, 2008
Messages
3,958 (0.81/day)
i just want to play games with 5 fps less, and 20 degrees less
That is not realistic. You would likely need to disable turbo boost to drop your temperatures that much and that will kill your FPS. Most modern gaming laptops run heavy games at over 90°C. That is just the way it is. If you want cooler temperatures, start reducing the turbo ratio limits. The drop in performance might not be too bad. You might find that a hot CPU is more fun than a slow CPU.

3.4ghz is the max in the benchmark
The most important thing in the TS Bench benchmark is that it does not report any errors. When the benchmark completes, if it only shows a time, that means the benchmark passed with zero errors. The TS Bench is just a quick test. If the voltage is too low, it will start showing errors within a few seconds. After you pass the TS Bench test, playing some games is a good real world test.

 
Joined
Jun 22, 2021
Messages
45 (0.48/day)
System Name Lenovo ideapad s340 15iml 81NA
Processor i7 10510U
Motherboard -
Cooling single fan cooling system
Memory 20 GB DDR4 2666
Video Card(s) Nvidia Geforce MX230
Storage 1TB samsung MZLVB1T0HBLR-000L2
Display(s) 1080p display 60HZ
Case -
Audio Device(s) dual 2 watt speakers with dolby atmos
Power Supply 65 watt
Mouse Hp omen gaming mouse
Keyboard -
VR HMD -
Software Windows 11
Benchmark Scores Geekbench 5: single core: 1189 multicore : 3997 compute(OpenCL):10976
there is a way to Squeeze max performance as well as keeping the cpu and gpu below 80 dgrees , its repasting the stock thermal paste with liquid metal but its very risky and the risk of loosing your device is quite high if u dont know how to apply the liquid metal coating properly it may short ur laptops circuit but if u want max performance and a cool cpu and gpu thats the only way in a laptop
 
Joined
Jul 25, 2006
Messages
8,957 (1.62/day)
Location
Nebraska, USA
System Name Brightworks Systems BWS-6 E-IV
Processor Intel Core i5-6600 @ 3.9GHz
Motherboard Gigabyte GA-Z170-HD3 Rev 1.0
Cooling Quality case, 2 x Fractal Design 140mm fans, stock CPU HSF
Memory 32GB (4 x 8GB) DDR4 3000 Corsair Vengeance
Video Card(s) EVGA GEForce GTX 1050Ti 4Gb GDDR5
Storage Samsung 850 Pro 256GB SSD, Samsung 860 Evo 500GB SSD
Display(s) Samsung S24E650BW LED x 2
Case Fractal Design Define R4
Power Supply EVGA Supernova 550W G2 Gold
Mouse Logitech M190
Keyboard Microsoft Wireless Comfort 5050
Software W10 Pro 64-bit
Joined
Jan 25, 2021
Messages
9 (0.04/day)
System Name Lenovo Legion y540
Processor i7-9750h
Memory 16gb
Video Card(s) 1660ti
Storage 1tb
Display(s) 144gz
And how is this pad powered? Via a USB port on the computer or [hopefully] through a USB Wall Adapter?

Yes, but I asked, "where did you see that 91°C"?
pad powered through wall, and i saw that on throttlestop, it was like 95 max and 91 avrg
 
Joined
Jan 25, 2021
Messages
9 (0.04/day)
System Name Lenovo Legion y540
Processor i7-9750h
Memory 16gb
Video Card(s) 1660ti
Storage 1tb
Display(s) 144gz
ThrottleStop does not report the average temperature so maybe you were using something else.
i know but i was using, msi afterburner, and then i watched temps in throttlestop

Now at 3,4 -250 core and -125 cache, im getting 40 fps on warzone and 90c :(

ThrottleStop does not report the average temperature so maybe you were using something else.
so do u know what can i do??
 

unclewebb

ThrottleStop & RealTemp Author
Joined
Jun 1, 2008
Messages
3,958 (0.81/day)
do u know what can i do?
In the Options window check the Nvidia GPU box. On the main screen, turn on the ThrottleStop Log File option and go play a game for at least 15 minutes. When finished testing, exit ThrottleStop so it can finalize your log file. It will be in your ThrottleStop / Logs folder. Attach a log file to your next post so I can see how your computer is running.

Some laptops power limit or temperature limit the Nvidia GPU. This can kill FPS. This might be your biggest problem. The log file should show what is going on when gaming.

You seem to have a lot of stuff running in the background. This can interfere with gaming performance. Open the Task Manager and look at the Details tab. Is there anything using a lot of CPU cycles that does not need to be running all of the time? Windows 10 can be very efficient if you keep an eye on what you install.

 
Joined
Jan 25, 2021
Messages
9 (0.04/day)
System Name Lenovo Legion y540
Processor i7-9750h
Memory 16gb
Video Card(s) 1660ti
Storage 1tb
Display(s) 144gz
one thing i notices is that while gaming it pops a red colored word that says POWER next to the prochot

btw max temperature of cpu was 83, but so looow fps, like 40 on warzone playing in low-medium
 

Attachments

  • 2021-08-21.txt
    117.2 KB · Views: 42
  • main.png
    main.png
    154.5 KB · Views: 21
  • tpl .png
    tpl .png
    79.6 KB · Views: 17
  • core.png
    core.png
    273.8 KB · Views: 22
  • details.png
    details.png
    78.7 KB · Views: 16

unclewebb

ThrottleStop & RealTemp Author
Joined
Jun 1, 2008
Messages
3,958 (0.81/day)
Your log file shows your CPU is constantly power limit throttling down to only 20W. This is killing performance.

Try upgrading to ThrottleStop 9.4. Post a picture of the TPL window from the new version.
Download, unzip and copy the new ThrottleStop.exe into your ThrottleStop folder.


Your main PL1 power limit is set to 70W but there is another power limit throttling your CPU.

Are you using any manufacturer's software that has a cool setting?
 
Joined
Jan 25, 2021
Messages
9 (0.04/day)
System Name Lenovo Legion y540
Processor i7-9750h
Memory 16gb
Video Card(s) 1660ti
Storage 1tb
Display(s) 144gz
i was using lenovo vantage with silent mode, but i ended up uninstalling like a 3 days ago
 

Attachments

  • new.png
    new.png
    89.3 KB · Views: 31

unclewebb

ThrottleStop & RealTemp Author
Joined
Jun 1, 2008
Messages
3,958 (0.81/day)
Your screenshot shows that the MMIO PL1 turbo power limit is set to 25W. That is what is causing your CPU to throttle. Silent mode is still alive inside your computer.

Try checking the Lock box on the far right side of MMIO. Press OK and go play another game and run a new log file. That might help fix the low power throttling problem.
 
Joined
Jan 25, 2021
Messages
9 (0.04/day)
System Name Lenovo Legion y540
Processor i7-9750h
Memory 16gb
Video Card(s) 1660ti
Storage 1tb
Display(s) 144gz
done just needed to press fn+q
im checking temps in 4 minutes

ok temps are nice, but i have a problem, 100 fps 85c max, but when i click right click to aim, my fps goes down to 67

ok temps are nice, but i have a problem, 100 fps 85c max, but when i click right click to aim, my fps goes down to 67
done just needed to press fn+q
im checking temps in 4 minutes

ok temps are nice, but i have a problem, 100 fps 85c max, but when i click right click to aim, my fps goes down to 67
or i shoot then i move and my fps goes down, no problem while shooting, but when i move after shooting, BOOM! 60-70 fps

done just needed to press fn+q
im checking temps in 4 minutes

ok temps are nice, but i have a problem, 100 fps 85c max, but when i click right click to aim, my fps goes down to 67

ok temps are nice, but i have a problem, 100 fps 85c max, but when i click right click to aim, my fps goes down to 67

or i shoot then i move and my fps goes down, no problem while shooting, but when i move after shooting, BOOM! 60-70 fps
is that a ram problem??
 

unclewebb

ThrottleStop & RealTemp Author
Joined
Jun 1, 2008
Messages
3,958 (0.81/day)
my fps goes down to 67
Your 1660ti might have a low thermal throttling temperature limit or a low power limit or maybe both. These are common problems with gaming laptops. You did not post an updated log file so I cannot tell if the CPU or GPU is causing the problem.

is that a ram problem??
Probably not.
 
Joined
Jan 25, 2021
Messages
9 (0.04/day)
System Name Lenovo Legion y540
Processor i7-9750h
Memory 16gb
Video Card(s) 1660ti
Storage 1tb
Display(s) 144gz
Your 1660ti might have a low thermal throttling temperature limit or a low power limit or maybe both. These are common problems with gaming laptops. You did not post an updated log file so I cannot tell if the CPU or GPU is causing the problem.


Probably not.
this one is pretty big, but i started playing at 2:36

srry the other one wasnt working, this is the one, started gaming at 2:36 (not the new one)
 

Attachments

  • 2021-08-22.txt new.txt
    581 KB · Views: 14
  • 2021-08-22.txt
    583.3 KB · Views: 10

unclewebb

ThrottleStop & RealTemp Author
Joined
Jun 1, 2008
Messages
3,958 (0.81/day)
The log file looks OK. Your 1660ti is running at max speed. I guess your mobile GPU is not powerful enough to run your game at max FPS all the time.

There are times when your CPU could be running a little faster. Your last screenshot shows Speed Shift EPP set to 105. This can reduce temperatures a little but it also reduces maximum performance. I prefer to let Windows control this setting. The Windows Balanced power plan with the power slider set to Best Performance in the system tray will usually set EPP to 84 automatically. If this works, there is no need to check the Speed Shift EPP box in ThrottleStop. Allowing Windows to set EPP to 84 is better for performance.

If you ever find a way to improve cooling, you could constantly run your CPU up to 600 MHz faster. Poor cooling is reducing performance.
 
Joined
Jan 25, 2021
Messages
9 (0.04/day)
System Name Lenovo Legion y540
Processor i7-9750h
Memory 16gb
Video Card(s) 1660ti
Storage 1tb
Display(s) 144gz
hi, i kinf of fixed the issue, now my undervolt is on -300 core, -137 cache, but now, in the details tab, the inactive system process is taking up to 90 of cpu, and i think that is causing blue screens do u know how to fix it?

hi, i kinf of fixed the issue, now my undervolt is on -300 core, -137 cache, but now, in the details tab, the inactive system process is taking up to 90 of cpu, and i think that is causing blue screens do u know how to fix it?
and its causing my cpu to get hot, without gaming or working wth
 

Attachments

  • Captura de pantalla 2021-08-23 193330.png
    Captura de pantalla 2021-08-23 193330.png
    111.9 KB · Views: 9

unclewebb

ThrottleStop & RealTemp Author
Joined
Jun 1, 2008
Messages
3,958 (0.81/day)
If you are having blue screens it is because your undervolt is too much.

Set your undervolt to -125 mV cache and -200 mV core like everyone else is using and see if you have any blue screens with those settings.

An inactive system 90% of the time is good but 99% is better.

1629774108156.png
 
Top