Ok. I already tried running game without gamebooster but it still gave lag spikes.

It didn't work with older drivers and doesn't work with new.

About fan speed, afterburner can't check those. Its allways on 30% even i clearly hear
fans getting faster.

And normally when i have played games temperature has stayed below 80.
So i am pretty sure that i just got some shit inside.

Still i realized that i can't open this because this might be "Sealed" with some sticker and
when i open seal brokes and no more warranty.

I will try just vacuuming fan spots tomorrow.