I have laptop with 3070 gpu, I use it to mine when it does nothing else ...
Well I cant change power settings on it but sometimes it take 94W of power and then it is hot and loud and sometimes (rather rare cases

) it takes 79W of power and then it is cool and quiet (hashrate more or less is same). Is there a way to set it always to be on 79W or that thing is beyond t-rex's control (some HP o15 own secret thing that is beyond my control).
sorry for my english. I hope you got my question

Use MSI Afterburner to set the Power limit to 79 watts.
if I cant set power setting in t-rex, you think MSI Afterburner allows it ?
edit:
actually after installing msi afterburner --pl option started to work

was it because installing afterburner ? or was I wrong at begin ?

afterburner shows power limit lever but nothing happened when I used it.
My guess is the varying power was due to thermal throttllng reducing the clock. Once you were able to set a lower power limit throttling bercame less likely and the power
leve was more stable. If the clock is lower there will likely be some effect on hashrate. Additional cooling for the laptop would be a good idea for many reasons.
I have no clue why installing afterburner made a difference.