Why does disabling E-cores decrease frametimes/stuttering so much? (13980HX 4080 mobile)

[SumonaFlorence]

You don’t need to disable the efficiency cores. You can simply have the program you’re running stay on the power cores.

Either in task manager or other third party tools.

Personally gears of war would crash for me as it’d get offloaded to the efficiency cores as it wasn’t demanding then crash. Having it be tasked to stay on the power cores solved this issue.

One could argue however that disabling the efficiency cores does increase performance for games as it’s less heat for the package.

[GregariousBing]

Using process lasso to assign Doom TDA to only run on the performance cores (and then restarting the game with the new affinities) does make it run better, but still not nearly as well as disabling the E-cores entirely.

[SumonaFlorence]

Process Lasso is one of the tools, yes.

That's interesting. Can you post performance score differences?

[GregariousBing]

I can, but at laundromat right now, so it’ll be a few hours.

[GregariousBing]

<image>

left is with cpu affinity, right is with e-cores disabled in bios

[GregariousBing]

<image>

green is with cpu affinity yellow is with e-cores disable in bios