R9 390 Restarting The PC Frequently

[Taufiq_1]

Sapphire nitro r9 390 Making My Pc Restart Frequently . 1 week ago i installed Max effect Andromeda Then I tried to play it at Max Setting . Then The Pc Restart . After That Restart My pc start Restarting On even Simple Games Like Dota 2 . :/ I tried to Run On Internal Gpur . It worked perfectly no problem at all . My Psu is Thermaltake 650W Gold 80+ certified . Its New tho Only 6 month used . . I dont Think Psu got any problem bcz I tried to run GPU Stability test nd it caused to restart . Any Suggestion ??? PLs help .

 

[Zerk2012]

Run OCCT and Furmark at the same time and check the temps when running them.
I would suspect the power supply or a heat issue.

 

[Mankar Kameran]

Do what Zerk2012 said first and check the temps. What OS are you running? I've seen a PC that also did that and Windows 10 had to be reinstalled. No problems after that.

 

[SgtScream]

Does the computer blue screen then restart or just restart?

 

[Taufiq_1]

just restart . nd i cant run test . if i do pc restart

 

[Zerk2012]

Can you run OCCT without it restarting.
If so I would say bad PSU.

 

[Taufiq_1]

Just Reduced The Gpu Memory Clock Speed From 6600 MHZ to 4000 MHZ ... All Running Smoothly . Also Increased The Fan Speed Of Gpu .. But If i set it to default it start to restart