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

Lenovo Y540 (i7-9750H and RTX-2060) Undervolting Issue

ytcns

New Member
Joined
May 17, 2020
Messages
10 (0.50/day)
Hello,

I bought this laptop 2 weeks ago. While playing division 2 or forza horizon 4 games, I saw 92-95 degrees on CPU. So I googled, saw some undervolting guides on youtube. In a guide says; -125 core and cache volt, set all multipliers to 34 and turbo long&short to 24 and lastly miscellencious to 30 too. It made my degrees about 75-80. It was cool. Then I learned there is a limit reasons windows in throttleshop. When I see that constant PL1-PL2 in core and edp other on ring red. I dont understand this limit reasons red blinking is bad? Can I use these settings?.

Then I made the changes like in screenshot via another guide and some guides in this forum. long 45 / short 60, misc 45 and multipliers 40-39-38-37-36. Now in 1024M test only blinking. I dont know what to do. I dont want to see 85+ degrees on laptop. Isnt it 88-90 degree is bad?

Help me please what is all about. Thanks alot
 

Attachments

Joined
Oct 22, 2014
Messages
8,118 (3.95/day)
Location
Sunshine Coast
System Name Black Box
Processor AMD 3200G
Motherboard MSI X470 Gaming Plus
Cooling Stock
Memory Adata 8Gb 2133Mhz DDR4
Storage Kingston A2000 512Gb NVME
Display(s) AOC 22" Freesync 1m.s. 75Hz
Case Corsair 450D High Air Flow.
Audio Device(s) No need.
Power Supply FSP Aurum 650W
Mouse Yes
Keyboard Of course
Software W10 Pro 64 bit
Your temps are fine under load.
 

ytcns

New Member
Joined
May 17, 2020
Messages
10 (0.50/day)
What about the values? miscellanous 45 is good? Should I make 255? multipliers should I make 40 all? .

Or should I make all multipliers to 34 and turbo long&short to 24 and miscellencious to 34 again for low temps?
 
Joined
Oct 22, 2014
Messages
8,118 (3.95/day)
Location
Sunshine Coast
System Name Black Box
Processor AMD 3200G
Motherboard MSI X470 Gaming Plus
Cooling Stock
Memory Adata 8Gb 2133Mhz DDR4
Storage Kingston A2000 512Gb NVME
Display(s) AOC 22" Freesync 1m.s. 75Hz
Case Corsair 450D High Air Flow.
Audio Device(s) No need.
Power Supply FSP Aurum 650W
Mouse Yes
Keyboard Of course
Software W10 Pro 64 bit
What about the values? miscellanous 45 is good? Should I make 255? multipliers should I make 40 all? .

Or should I make all multipliers to 34 and turbo long&short to 24 and miscellencious to 34 again for low temps?
@unclewebb
 

ytcns

New Member
Joined
May 17, 2020
Messages
10 (0.50/day)
I saw 92 degrees.. Then I made all multipliers 36 and misc 36 too. Will it help to decrease temp in hard games?. or playing with 92 degrees for years really good?

@unclewebb
 

Attachments

ereko

New Member
Joined
May 10, 2020
Messages
17 (0.63/day)
Will you help me please?
Remove C1E, Speedstep, Remove C3 autodemotion and undemotion. Also go back to defaults at turboratio limits.

Also if you set from windows power settings processor min state to 100% you can remove speedsift and let windows do the thing.
 

unclewebb

RealTemp Author
Joined
Jun 1, 2008
Messages
1,836 (0.42/day)
or playing with 92 degrees for years really good?
Intel says their CPUs can run reliably at any temperature under 100°C. That is the Intel spec.


Lenovo has reduced the thermal throttling (PROCHOT) temperature to 94°C. This will prevent the CPU from ever reaching a dangerous temperature.

There is no need to reduce the turbo power limits to 24W. This can significantly reduce performance. I would not bother lowering the turbo ratio limits either. Let your laptop run as Lenovo designed it to run. Fast and hot. You bought a laptop with a high performance 6 core CPU. It was designed to live a long life while playing games at sky high temperatures. That is how laptops are designed in 2020.

Why remove c1e, c3 and speedstep?
There is no reason to do any of that.
 

ytcns

New Member
Joined
May 17, 2020
Messages
10 (0.50/day)
lol but If I do that I see 95 temp. See the screenshots. It will harm the pc in years. I only made 40 multipliers and 90+ degree. I dont understand why it doesnt drop with only undervolting -140, why I have to reduce turbo power limits.
 

Attachments

unclewebb

RealTemp Author
Joined
Jun 1, 2008
Messages
1,836 (0.42/day)
It will harm the pc in years.
Intel says that 95°C is a safe operating temperature. Your CPU will be fine.

I dont understand why it doesnt drop with only undervolting
Your CPU runs extremely hot because the heatsink and fan are not adequate or they were poorly installed or maybe both. They cannot keep your CPU cool. Many laptops with this processor have heat problems.

When you undervolt your CPU, either power consumption will decrease or your CPU will run faster and power consumption will stay the same. If your CPU was previously throttling, it will run faster and power consumption and temperatures will stay the same.

Some 8750H and 9750H owners have been able to lower temperatures a little more by undervolting the CPU core more than the CPU cache. Keep the cache at -140 mV and try decreasing the CPU core further towards -200 mV. Go in steps of -20 mV. Run a test like Cinebench R20 and see if your scores improve by doing this.

 

ytcns

New Member
Joined
May 17, 2020
Messages
10 (0.50/day)
So I am resetting all throttlestop by deleting .ini file and making cache -140 and core -200. I dont bother decreasing performance.

If I dont lower multipliers or turbo boost limits (Short/llong) temps will not decrease alot.

I will tell you the result tomorrow.

I couldnt make more -155.3 mV. It started to give blue screen and freeze. Cinebenc result is growth 100 points. But degreess always 88-95 celciuse. All other options in the throttlestop is stock by lenovo. I didint change anything more than voltages.

Can you please tell me do I need alot power like this?. I just want to play games 85 celcius max. What should I do?.

Which multipliers? (I had made all 34 in my first use of program)
Which turbo boost power long and short limit? (30-30 in my first use)
PPOE limit? I didnt do anything
Speedshift max?. (I had made this 34 too because the highest multiplier was it)
 

Attachments

Empecial

New Member
Joined
May 24, 2020
Messages
15 (1.07/day)
This is my current idle. I think the last one was just after the test.


Try this:

Non turbo ratio to 1. Disable and lock turbo power limits check. Cpu core and cache iccmax all the way to right.
what does iccmax do exactly?
 
Top