New PC, I get a black screen after sleep mode for no reason, I reboot and everythings fine until i leave and it goes back to sleep mode. gaming computer builder

I recently bought a brand new ambitious gaming rig. I spent 2000$+ (including monitor) on this so I am quite worried why these problems are arising. In gaming everything is fine, I get the expected frames, however anytime the system goes on idle (I leave for 2+ hours) I come back and the screen is black. I move the mouse and i can see the cursor moving, but that is it. It's completely black and I can only move the mouse cursor. I have to reboot each time it happens. Here are my specs

CPU : i7 7700k

Cooler: Noctua NH D9L

Motherboard : Gigabyte Z270

Memory: 16 GB

Storage: Samsung 960 EVO 250GB + 1TB HDD

GPU: GTX 1080 Ti

Case: NZXT

PSU: SeaSonic 650W

Monitor: AOC Argon 144hz 1440p

submitted by /u/AmazingAkali
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