Windows 10: Grey screen after using my PC

Hi, I'm not sure what is happening to my PC at the moment but I keep getting a completly black screen after turning it on. If I leave the computer off for a while I can get as far as having 10m access to my PC before it just happens again. Really stuck on what to do. I've try doing a factory reset and within that time the screen just goes grey. Any help would be appreciated.

:)

 

PC Build Steps

Ok just because I like steps i am going to create some steps. Please give me the stamp of approval/disapproval

• Install system in case
  • Remember to connect SSD and optical to same SATA ports on motherboard
• Turn on PC
• setup HDD
• run blend test in prime95 for 30-60 min
  • run realtemp at the same time

• While in Prime95 test
  • if CPU goes above 70c in RealTemp, I have a leaky CPU
  • if my system locks up or blue screens, there is an instability in the system somewhere
  • if my system does not lock up or blue screen, my CPU is not damaged and I am in the clear!

What do you guys think??

 

Overclocking / Undervolting guide for Vega 56 or 64?

Here's a quick laundry list:

List of software to use for overclocking and testing
Examples:
Wattman (and how to find and use it, like an overview, including profiles)
Unigine Valley or Heaven (use this for quick testing while changing settings in Wattman and checking for stability / artifacts) ...just suggesting this
How to monitor cores / mem speeds and temps during testing (I've seen screen overlays, and others using GPUz)

Step-by step overclocking in Wattman
Fan speeds
Power limit
Temp limit
Voltages
Core speeds
Memory speeds

 

HD5770 grey screen problem

My Grey Screen was caused by bad memory. Changed the memory and everything has been good for over a year. What i mean by this is that Grey Screens are not black and white to solve they are in the grey area. There are alot of different components within your computer that can be causing the grey screen. If you can i would RMA 1st though because the GPU may be really sensitive to your system. If you still have issues after the RMA got for overclocks and RAM.