Game gets stuck when PC is running?

I have a system with these specs:

Mobo: ASRock X99 Extreme4
CPU: Xeon e5 e2686 v3
GPU: 3060 Tuf Gaming
RAM: ecc 16gb
OS: Windows 7 Ultimate
Monitor: LG UltraGear 27GP850-B

I alway login game and turn off monitor when i go out.
I use HDMI cable , turn off freesync premium, turn off Smart energy saving, power led ON, hdmi compatibility mode OFF but i turn on Monitor and got issue in video. This game is not responding and freeze some sec after, i try to many way but it not woking for me.
Try to change cable , try to displayport so dont any thing to change.
How can help me to fix this isssue?
https://youtu.be/1seWsmgHXIs
I see in monitor power data :


How to change S2,S3,S4,S4->D3 to D0 ?