How many fans do you have?
1 top 1 exhaust 1 on the cpu cooler. cpu cooler one isnt spinning even on boot........
Should spinning all the time
normally power up it should spin but never. played a mkv which should eat up 10-20% cpu but no spin also.......
By default all fans will spinning from booted
ya. initially thought it was a psu or gfx card problem. open up found this. so now could be cpu overheading issue. tricky thing is i cannot reliably replicate the crashes cos sometimes is boot half way reset than other is froze screen while gaming or surf web halfway pop 1 core dump qr code...
Replace cpu fan as soon as possible. Repeating use of computer when cpu fan is down cause premature damage
