I have a stock Alienware 17 R2, a while ago before ArmA 3 update 1.64 it used to run smoothly at 60 fps in clear enviroments and 45 -55 in combat zones but constant in said conditions, but now after 1.64 whenever i connect my laptop to the AC Current to charge it, it plays fine for like 10 minutes then it goes down to 14 fps, i have done everything and anything to boost fps, and although i gained some FPS when not connected to current, those 14 fps are constant.

e.g. Before the fixes for fps it went down to 14 fps when connected to A/C current, now after the fixes it still goes down to 14 fps.

It ONLY happens when connected to A/C current, i have even set it to desktop mode so it doesn't charge the battery but to no repair, it still drops the fps periodically and the more time i spend in-game the faster it does it, first time it takes like 10 minutes to do it, second time somewhere around 8 minutes and so on until it happens every 2 minutes or so.

Thanks in advance!