PC Crash

[Rashy]

I recently made a thread about this but this one seems a little off than the last one

My system crashed without any notice, just like a hard reset, no BSOD, i wonder if its the failsafe

Usually when im playing high load games like GTA V and CSGO (map loading big firefights) or DOTA 2 (particle effects ARGH) it does this, its annoying when you cant reconnect in time! Ive undone my OC and done AIDA64 System Stability Test, in a matter of 20 min the system crashed without any blue screen and AIDA showed no results. Can anyone help me? Rig in sig. Factors that might affect:

• Switching plugs, from a big 4 plug to a small china made 3 plug that i switched my pc to
• When it crashed and restarted sometimes it shows a white glitchy display and no motherboard brand
• And sometimes when it starts up many icons in the taskbar had gone missing like this:
  

And i did not have this before 3 days ago

[Rashy]

Can i get this problem resolved in a short amount of time? I will be very cooperative.

[Rashy]

Wheres help when you need one D: I CANT PLAY ANYTHING WITHOUT STUFF NOT GETTING SAVED AND CRASHING