I managed to bypass the STAPM, but how did you get 45W power? I can’t unlock the power limit
I used Smokeless UMAF. After using the custom EFI image to boot, you don’t need the image further, you can boot into UMAF whenever you want on the boot menu
Bootmenu
After editing, press F10 to save, then hit ESC to return to the boot menu, go to “UEFI Misc Device 3” again, Enter.
Before editing the power goes up to 51W in a few seconds then goes down to 33W, the sustained power limit, unfortunatly it goes down to 28W due to the notorious STAPM
Decrease the power/thermal limit are without problem
Noticed that I changed the slow PPT time and it shows as well, stressing the CPU confirms that it’s working
Increase the power limit does nothing, the power is still capped to 51W → 33W as shown
I can change the time from 5s to 20s, to some extent… I didn’t increase the TjMax as the CPU can change from 40C to 90C in a second, even if I just want to see whether the displayed TjMax increased on HWINFO it’s still too risky if booting up the OS runs the CPU full tilt above 5 seconds.
The most headache is the STAPM
I set the STAPM to manual, make it not to measure skin temperature otherwise the power will go down after 1 min of gaming. I also set the system configuration to 35W and this supposedly to make the power not to decrease by a timer even if the temperature itself is lower.
It didn’t work, it goes to 28W after 10 mins of gaming. The 35W in HWINFO was a lie.
Change the sustained power limit to 35000mW, doesn’t work.
Set the Tskin Time Constant to 99999s, didn’t work, can’t get rid of the countdown. Disabling STAPM boost(set Override to 1 and STAPM Boost to 0) doesn’t work, get straight to 28W, even the 33W “sustained” power was gone.
I eventually found that you need to think counterintuitively. Set the STAPM to track the skin temperature, but only take action after 99999 seconds, not tracking the temperature disables to 99999s as well(falls back to 10 min).
Gaming for 2 hours, sustained 33W, not falling back to 28W.
What if you set the fast PPT limit to desired level and increase the time? Didn’t work, the time is capped to 30s, set to 240s or 99999s did nothing.
Since you already found a way to increase the sustained power to 45W, with my finding of way to bypass the 28W STAPM, you might be able to get higher sustained power for hours and beyond.
Without tweaking these, potentials are wasted, gaming with 28W only gets me 69 to 72C without repasting or other cooling modification, and I can reduce the noise by set the fanduty to 50% and the temperature not even reaches 80C.
I think these findings can be helpful to FL16 owners as well, the 7840/7940HS has a “sustained” power limit 54W, but STAPM will cut the power to 45W after half an hour, by bypassing the STAPM, FL16 users can get the sustained power true to its name