6:30 That's a huge temperature drop.

As great as it is to see you testing this i do wonder if there's a bit of an issue with the methodology: On the Celeste test the amount of power required to run the game at 60fps is likely so small that the baseline power requirement needed just to power the screen, memory, SSD, ram etc. probably far outweights any efficency gain made from an undervolt on the CPU, thus the perceived efficency gain is so small. With Cyberpunk you could very well be observing an efficency gain, but due to running the game unlocked the deck is using that saved themal headroom to keep clocks higher and thus push a couple extra fps. This means the system is pulling max TDP in both stock and undervolted senarios, and the battery life seems the same. The way to prove/disprove this would be to use a highly demanding game like Cyberpunk, but instead to cap something it can consistantly achive (and you may actually play at), say 30 or 35fps, then repeat the stock vs undervolted test.

Just reset the cmos if you cant boot after undervaluing. Hold down the Volume Down button, the Three-dot button, and Power button at the same time

I've seen some videos demonstrating that undervolting can result in a slight FPS boost, around 2-3 FPS. I also noticed that when you were testing Cyberpunk 2077, the FPS on stock voltage hovered between 41-43, sometimes dipping below 40, and rarely reaching 44-45. However, with undervolting, the FPS seemed to consistently stay between 43-45, never dropping below 40, and occasionally hitting 46-47. If this is accurate, then the free 2-3 FPS boost from undervolting seems like a worthwhile advantage.

Please consider using some other sound for the battery rundown next time you do this, it's super harsh and unpleasant when listening at a volume at which I can actually hear what was being explained

Watching this while playing cyberpunk at1080p at 40fps FSR balanced 29 Watts and overclocked to 2000mhz with GPU. Sadly the CPU is still stuck at 3500mhz. All of this and the GPU only hits 90c. The oled is an overclock BEAST!!!!!! ..... I should add I am running PTM 7950 thermal pad and full blast fans, but they are surprisingly quiet.

Did anyone else read cryo's comments in thier voice? LOLOL thanks for the testing HTLL!

Next video overclocking ? I appreciate the videos. I am undervolted 30/50/50 which makes me feel like I'm running elden ring better but havnt got brave enough for the overclock.

It's more useful and fun to those who like to tinker with such things and run benchmarks than running an undervolt on an SD OLED. Personally I've set the max battery load capacity to 80% and almost always have it plugged in.

is there any way to change the voltage / frequency curve of the GPU?

Hoping you do a repasting and applying liquid thermal on SD to see if there are benefits.

❤❤❤love this console... Perfect!!

don't forget after you found your stable levels you can try reducing power by game I tend to leave the gpu power alone but game like the og ff7 runs really stable at 4(that includes mods from 7th heaven) and cyberpunk for me is a 8

💀 I searched for days for a clip like this, and when I received the device, KZfaq suggested this Video to me

bro u need to lower TDP with undervolting, with undervolitng you can put that high power in lower TDP, cuz voltages lower Like, normally i playing with 15w tdp in cyberpunk, with undervolt i can play with same settings and frequency but in 10-12w tdp

My steam deck wont boot now

Oled burn-in test...

Everyone in the tech (and including you) always recommend to stress test the device after undervolting it with heavy work loads. I just don't get, why?? I know the typical answer. However, there are ton of people who use their devices in lightweight scenarios and games. I don't think it's a good to skip the coldness and extra battery life you will gain just because it crashed on a AAA title that you'll never play. It's just a handheld guys, not a full computer 🤦🏻‍♂️ I recommend keeping your undervolting as long as it can run your apps/games that you're using on a daily basis 😉