Game starts to lag after 10 secs of gaming

Aerowolfz

Commendable
Dec 30, 2016
5
0
1,510
So, my laptop recently started acting up. And by acting up I mean, for example: I played a racing game for 10 seconds smoothly (Trackmania Turbo) on the lowest settings (it was 60fps) and after those 60 secs.. it started lagging like crazy. My laptop specs are :
Intel Core i3-3110M (Dual core hyperthreaded 2.4GHz)
NVIDIA GT 620M 1GB GDDR3
4GB RAM
And oh, the laptop itself os a SAMSUNG NP300E5C. Any help? And yes, I enabled the dedicated GPU.
 

Aerowolfz

Commendable
Dec 30, 2016
5
0
1,510
Probably. Since I can't buy compressed air (or any laptop cleaning thing from-the-inside) right now, I'll try that in 2 days.
And yes, when I start up the game the fan goes FULL SPEED.
 

Aerowolfz

Commendable
Dec 30, 2016
5
0
1,510
Playing for 2 minutes would make my laptop turn off. Okay so when gaming:
CPU temps were fluctuating between 73°C-80°C when gaming
GPU temps were almost the same, something like 71°C-79°C
Forgot to say that i was playing for 1 min and 30sec