Pc restart when stress test on GPU

[JOHNGREEN123]

i run furmark stress test on GPU and pc restart.. what must i do?.. please help..
My spec:
proc: i7 6700k
Gpu: msi gtx 970 gaming
Psu: Seasonic s12ii 620bronze
mobo: Asus pro gaming
Ram: Kingston 8gb
CPU cooler: Hyper tx3
3x140mm 1x200mm fans on casing

 

[hang-the-9]

Test the video card in another system to make sure it's good. Did you check temps in the system under load?