12v low

My english is bad. ASUS Z77-A Intel Core i5-3550 Gigabyte Gaming RX 570 4GB 10GB DDR3@1333 Xilence XP500R7 (500Watt) The only problem that i've had with this setup was asus anti-surge trigger. I disabled it and no more problems, no crashing, no freezing, no random reboots. Gaming 5-6hours...