New GPU crashes while gaming but not under synthetic load

[Dopppp]

Just bought a brand new Asus strix 480, started playing games and my pc crashes to a coloured or gray screen. Its not my 700 watt corsair psu. I tried running furmark for 30 minutes and it only got up to 65 degrees and no problems at all. I tried installing new drivers but nothing works. With my old gpu it ran fine for years.
Specs:
Athlon quad core (not overclocked)
8gb ripjaws ran
1tb hdd

Please help me

 

[RobCrezz]

Try underclocking it by 50mhz on the core.

 

[Dopppp]

Try underclocking it by 50mhz on the core.

Hey tried it and it worked for a few hours but it crashes in the same way and I had a bit lower fps (which I understand)

 

[RobCrezz]

Ok try clocking it down by 100mhz just to see if its stable.

If it then works, you might have to return it. Occasionally some gpus arent stable at stock speeds and should be sent back as faulty.

 

[Dopppp]

I've got it! after a few hours trying things and looking on forums the solution is:
-Ramp up the case fan
-make a more aggressive fan curve. preferably without potions where the fans are 0 rpm. i think its because the power components get too hot (?) tried running a game while having dinner and watching a movie and.... it still works!