My laptop went back from warranty repair with changed uppercase + keyboard and additionaly updates BIOS to the newst FSCN18WW version without actual consent from my side. I decided to put it under the test with Cinebench and it really got me angry. How is this possible that the temperatures from before the warranty repair when I had FSCN14WW BIOS Version were lower about 10-15C. What I noticed is this that my CPU right now is working with higher voltage than my friend's unit (He has exactly the same laptop but with FSCN14WW BIOS version) thus higher power. I assume that it is the reason for the malfunctions during testing - I'm having higher temperatures with a little lower frequency clock and lower score on Cinebench. For the actual proof I attach screenshots from my Cinebench test temperatures and my friend's one.

My laptop's screenshot is at the bottom with FSCN18WW version (Or FSCN13WW/FSCN15WW - it does not make a difference) and above it is the pretty much new laptop with FSCN14WW version right from the shelf (Same model, same CPU, same GPU). Notice the voltage, power and temperatures. Something with my unit is not right and I assume it's because the BIOS. The most infuriating thing is that I can't send it back on warranty because most likely no warranty service will acknowledge it as an actual problem even though the laptop works noticeably worse during heavy load.

Hello @James_T_Kirk,

Thanks for reaching out.

I would recommend opening the BIOS and loading the default settings.

This should revert any tweaks to the CPU clock speed and voltage use. 


Hope this helps.
Regards,
Jack_Lenovo1

I've done that before. What I did actually was installing several BIOSes (fscn13ww, fscn15ww and fscn18ww - couple of times actually). I also tried tweaking all settings in BIOS regarding the CPU or some power settings - it still didn't help. I also tried to manually limit the TDP on CPU with Ryzen Controller App - the temperatures were still a little bit higher than it should but these were around 83C when I set TDP to 49W. It still resulted in higher voltage though and the frequency wasn't at its max. Before warranty repair with fscn14ww BIOS I was able to keep full on 3992mhz throughout the whole test with only 80C at maximum - just as on the screen from my friend's Legion.

I'm really suspecting that the reason for that is BIOS update (at least this is the last resort) - I mean I don't think that the Lenovo's service by changing the uppercase caused some actual mechanical malfunction causing the voltage and power of CPU run higher than before. It's quite problematic also because I don't think that the problem is eligble for warranty repair in fact.

If it is possible to acquire fscn14ww version of BIOS somewhere I could at least make sure that it is the problem (or on the contrary). It bothers me a lot since it got worse just like that after that warranty repair. I suppose that this version of BIOS is installed with stock new laptops probably by factory. It's quite bad that the service decided to update the BIOS without actual need for it.

I also encountered the same temperature issue, I tried cinebench R23 and autodesk Inventor ray tracing and my cpu temperature reached 101 degrees C. No bios updates, just driver updates and it's only a week old. Also reached 97 degrees C when playing CSGO.

Can you make sure that the BIOS version you have is FSCN14WW or some other one?

yes i can confirm this is true, the latest bios update fscw18 brought this non reversible changes

now my laptop runs very hot over 100°C on cinebench, also crashing a lot more due to temp shutdown (kernel id 41).

Bios Update is **bleep** and lenovo should revert those changes, im getting 10-15°C more temps on the CPU!!

reverting to fsc13ww does not fix this, seems the voltage got permanently altered