Notebook gaming

I have this notebook which has nvidia 940MX 2gb (also, i5 7th gen, 8gb ram, 250gb ssd 1tb HD, win 10) When I open CS:GO with batteries on, the game runs smoothly, the gpu works fine. I get nice constant fps. However, immediatly after I plug in the power supply, the gpu usage starts spikin from...

Hi, I was wondering if someone could tell me a fair price for my 2015 MSI ge62 2qf apache pro. I have only had it for about a year, I have everything that came with it (Box, cables, papers, etc) and it is in like-new condition. I bought it for gaming on the go, but I stopped so it isn't much...