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?
I see in monitor power data :

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

It sounds like your game freezing up could be due to a few different things. One common issue might be that your PC doesn’t meet the game’s system requirements. Games that are too demanding can sometimes freeze or lag on less powerful computers. Another possibility is that there could be a problem with the game files themselves. Sometimes files can get corrupted, especially if you’ve been playing for a while without restarting your PC. It’s also worth checking if you have any other programs running in the background that might be using up too much of your computer’s resources. If none of these solutions work, you might want to consider reaching out to the game’s support team for further assistance.