Windows 10: Being absolutely tortured by lock screen lock ups...please help!

Please provide a list of things that you have tried?

 

The only two notable things, other than the PLL setting you provided and the cummulative update of recent days, are disabling all tray apps and now uninstalling Malware Bytes.

I am also currently in the process of trying something else; I have disabled passwords for all user logins.

This is like a needle in a haystack.

 

Yes, it is. But it needs proper planning.

Next, let us play attention to the display/graphics section. Do the following:
► Break the SLI, run the computer with every single card separately.
► Stress test the Graphics Cards using Furmark. Upload the screenshot for us. Also let us know if you have experienced any crash/BSOD and/or artifacts during the test.
► Try an alternative nvidia display driver version, preferably doing a clean driver install. NVIDIA Drivers - Avoid Problems
► Check in the BIOS. If there is an option to rest the display, keep it off.
See how it goes.

 

I will turn to this lot if my current solution stops working, but that's over 48 hours now without a black screen. All because I removed passwords. But I would ask if any of that was the solution, why is it not affecting Windows 7?

 

So I got another black screen the other day, hence have returned to this. Like you say, systematic planning.

My first step was to remove the second 980ti - break the SLI as you say. I have also tested with Furmark - it was flawless and got to about 81C. I've already had the black screens on previous Nvidia drivers so it's not a driver issue. I don't quite understand the display rest option? The screen is definitely not resting during the black screen - cursor is there and windows + P dialogue works.

But I want to see if this is indeed a problem we can isolate to the SLI setup or indeed a faulty second card. But I do reiterate, any reason this didn't happen on Windows 7 based on the hardware solutions you've provided? PS I am grateful for your help so please don't take this as ingratitude.

Cheers.