I started to get this problem a few months ago when the screen is freezing for a few seconds during gameplay and then the monitor goes off saying "No Signal" with the games crashing afterwards.
This started back in December 2019 when I first play GTA V roleplay with FiveM and this error started to get more frequent to the point where I get this sometimes when watching YT videos as well.
For troubleshooting I tried many solutions:
-clean gpu driver install with DDU
-resinstalling windows and formatting hard drives
-taking out one stick of ram (as read to be the solution for someone)
-memtest86 -> 0 error
-hddscan -> 0 error
-intel processor diagnostic tool -> 0 error
-checked every single hardware for possible physical damage
none of these worked.
There is no overheating either.
CPU: i5 9600k 3.7GHz
motherboard: ASRock Z390 PRO4
GPU: SAPPHIRE RX590 8GB
RAM: HyperX FURY 2x8GB DDR4 @3200MHz
HDD's: Toshiba HDWD130 3TB
WDC WD10EZEX-22MFCA0 1TB
PSU: Seasonic Focus GX 650 Gold
OS: Windows 10 pro version: 10.0.19041 Build 19041
Looking forward to any idea.