Windows 10: Pixelated screen when booting

I installed linux on my pc recently and sometimes, when i boot my windows 10 my screen is like in this photo for a few seconds

:)

 

Line of pixels on startup preventing windows to boot

Yes I've tried both suggested steps. Unfortunatly the problem is still there. It doesn't happen as often as before, more like 50/50. But when the pixel line is there, my pc does not boot up anymore. First when I waited for a while, it did boot up. But
now it's just a black screen and nothing happens.

 

Windows 10 Aniversary - Pixelated Screen

Hi,

I realize that after the Anniversary update you are getting randomly weird pixelated screens. I will try to help you with this issue.

As the issue is occurring after waking up the PC from sleep mode, let us try these steps to check if that helps.

You may run the Power troubleshooter and restart the computer to check if this helps.

• 
  Press “Windows key + X” and click on “Control Panel”.
  
• 
  Click on “Troubleshooting”.
  
• 
  Click on “View all” and select “Power”.
  

Follow the on-screen directions to run this troubleshooter completely. Once this is done, restart the computer and check the status.

Further you may also follow these steps to reset all default power plans to default settings:

• 
  Open a command prompt.
  
• 
  In the command prompt, type “powercfg –restoredefaultschemes” and press Enter.
  
• 
  Close the command prompt.
  

Remember to restart the computer to check if that helps.

Keep us updated to help you further.

Thank you.

 

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