PC randomly auto restart without bluescreen when Furmarking or Gaming

lemonadejack

Prominent
Aug 14, 2017
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510
Searched across the board for many similar cases, but seems not same. So I decided to make one for mine.

Started yesterday, my first match of DotA2 going smoothly, second match, picked hero, once it loaded map (haven't get to see the loaded game), it straight restart. Then tried using furmark, once it goes to testing (clicked test and pop up OK, but haven't see the benchmark process), same thing, straight restart without bluescreen (I already disable auto restart).

Changed to older driver, try furmark, first time worked, I thought was driver problem, but I leave PC idle for while and go for furmark again, restart again.

Sometimes PC restart, I go for furmark 720p preset, it work, then 1080p preset, working, together with prime95 with power consuming test, running for an hour without problem, close both, idle for while, about 10 mins, cool down, then test again straight furmark 1080p preset, restart again.

I assume is PSU because few days back there is a blackout at my place here. Temperature is normal when both CPU and GPU benchmarking in the an hour run, with both near 70 Celcius +-

Spec: (No overclock)
Mobo: Asus P8Z77-V
CPU : i5 2500k
PSU : CM B700v2 700W
GPU : Sapphire RX480 nitro+ 8G
RAM 8G