It was a heavy lag, it began with just a little freeze of 2-3 seconds randomly. As the days passing by the lag was more frequent, it was freezing all the time, giving me just few seconds of play time. I was playing Wolfenstein Old Blood at that time. But the GPU was running really fine for 4 weeks, I played and finish Far Cry 5, Wolenstein The New Order without any flaws... When I got heavy lag/freeze I was able to play Red Alert 2 (from the 90s...), surfing on the web, anytthing with very low demand on the GPU
So I finnally got on Troubleshooting, updated Nvidia Drivers, checked all temps (all was good), done some benchmark testing with "haven" (that was freezing too).
After some discussions on tom's hardware I swapped on the GPU to another PCIE, W7 detected the GPU all was really fine so I swapped back the GPU to the original PCIE slot, all was fine. After that:
updated BIOS and all drivers
Set RAM on XMP profile.
Done a new clean install of the GPU drivers with DDU.
All is fine now.
By now I suspected corrupted drivers, PSU, the GPU (by it's weight) could have mis-connection with the PCIE slot.
But in the discussion, the age of the PSU came on as a big possibilty/cause of the problem, so I was just wondering if in fact the PSU could be considered bad and how I can test it with anykind of software...