Hi everyone,
Here, I would like to share my experience in undervolting i7-8750H.
I bought a gaming laptop from a second-hand retailer last year. It costed me 55% of the original price and came with a defected 1T HDD.
It is a Lenovo Legion Y530, comes with i7-8750H, GTX 1050 4G, 24G RAM @2666mHz and 15.6 in display.
I used to play Pro Evolution Soccer 2020 within Steam App and the temperature was always 97 C.
Yes, that was before I heard of Thermal Grizzly Kryonaut and Throttlestop.
A month ago I bought the thermal grizzly kryonaut and pasted in my machine.
After that, the temperature never goes above 74 C when I play PES2020 (maybe PES does not demand so much resources).
Today I found out this thread and wanted to try out to get the most out of my machine using Throttlestop and I am quite happy with the result.
My machine:
Lenovo Legion Y530 15INCH
CPU: i7-8750H
GPU: GTX 1050 4G
RAM: 24 G (8+16)@2666MHZ
256 Gb NVMe m.2 SSD
Cinebench Release 20 CPU Ranking :
2946 pts (
Multi-Thread @ 6Cores 12 Threads)
Throttlestop setting:
Turbo Ratio Limit : 41/41/40/40/39/39 (Bios Default)
Speed shift - epp : 0
Turbo Long Power Max : 60
Turbo short Power Max : 90
CPU Core offset Voltage : -169.9 mV
CPU Cache offset Voltage : -145.5 mV
Intel GPU offset Voltage : -82 mV
iGPU Unslice offset Voltage : -82 mV
System Agent offset Voltage : 0 (default)
Average PKG Power : 54W
Max Temp : 90 C
View attachment 167081
Cinebench Release 20 CPU Ranking :
2261 pts (
Single-Thread @ 6Cores 6 Threads)
Throttlestop setting:
Turbo Ratio Limit : 41/41/40/40/39/39 (Bios Default)
Speed shift - epp : 0
Turbo Long Power Max : 60
Turbo short Power Max : 90
CPU Core offset Voltage : -150.4 mV
CPU Cache offset Voltage : -145.5 mV
Intel GPU offset Voltage : -82 mV
iGPU Unslice offset Voltage : -82 mV
System Agent offset Voltage : 0 (default)
Average PKG Power : 47 W
Max Temp : 81 C
View attachment 167082
There were no throttling for the above results and i7-8750H was running at 3.9 GHz happily. I would like to call it the SWEET SPOT.
Frankly speaking, I have no technical knowledge of fine-tuning the CPUs with Throttlestop.
It was just trial and error. At some point I tried to offset the CPU Cache voltage at -165 mV but it introduced me the infamous
Blue Screen of Death. I can make it back to -155 mV but -145 mV Cache offset can perform better in my case. I tried to offset the Core voltage at -1000 mV but -169.9 mV is the best that performed.
I started with -100 mV offset and lower the increment like -125, -130, -133, etc...
I think the cooling system of our machines also play a big part in this case.
Ok, that's it. Happy Tuning!! Cheer!!!!
Edited: There are some guys in youtube who can get Cinebench R20
@ 3100+ pts by using Throttlestop (mostly MSI Gaming Laptops). Yes, that's insane.