Hopefully this helps anyone wanting to run MW3 from GamePass this week on the new ROG ALLY X.
17w Performance Mode - On battery
Mostly 60FPS, it's very playable even with dips. Settings are mostly on low.
For some reason 30w plugged in causes COD to throw High Temp GPU warnings, so IMO use 17w plugged in. I tried framegen and higher fps but that dang High Temp GPU warning, so my target was 60FPS and trying not to overload the GPU.
*Update: using 25w TDP with all sliders set to 25 works great, plugged in set all sliders to 30w and it won't overheat* Easily gets over 60fps with those TDPs**
Sorry the video looks grainy in the recording, but it looked perfect on the display.