Every time i play games (Dota2), it tend to blackout and i have to force restart the pc. But it worked fine for games like LoL and CSGO.

Is it GPU problem?

If yes, whats the best bang for buck GPU to upgrade. (Budget around 1k+)

Below are my current spec. Thank you.

Intel Core I5 3470
Asrock H77 Pro4/MVP
Gskill SNIPER 2x4GB DDR3 1600mhz
Enermax NAXN82+ 650W PSU
Leadtek GTX670 2GB DDR5
Plextor M5S 128GB SSD
WD 1TB Caviar Blue

Thanks for the advice.
I forgot to add, it blackout when i played other higher detailed graphic games as well. Like gta5, FC4, Witcher 3.
Anyhow, will try your way later. Thanks again

This post has been edited by 92alvin: Nov 1 2016, 03:06 PM

Okay, will do the driver sweeping method first.

Normally, background sound will still continue playing for few seconds after screen goes black and completely cutoff after that few seconds. Then i will force restart it.

There were some times it goes black with some buzzing sound.