3 Month Old Computer HUGE Sudden Problem

[BazookaTroopa]

I just built a brand new computer 3 months ago. Everything was running perfectly up until about a week ago.

Now when I try to play any games in full screen, after about 30 minutes the screens will freeze and I will lose all power to any USB devices (keyboard, mouse, headset). My speakers plugged in through AUX will just make a non stop buzzing sound. This occurs even with non intensive games like CS:GO or League. I never seem to have this problem when not in full screen.

When this happens there is no way to regain control of the computer unless I do a hard reset. This is really concerning me and I do not know what to do to fix it.

I am running Windows 10, with an i5-6600k, GTX1080, CORSAIR RM750 PSU, and ASUS Z170-A MOBO. Please help me. Thank you.

[MightyMic]

I'd unplug all your power cables and plug them back in. Also, try re-seating your ram and gpu.

[BazookaTroopa]

Should I update my MOBO as well? Thank you.