Ok.... I'm at a loss with this one. Hoping someone here may have some insight.... maybe came across the same issue in the past and might have an idea on what could be the problem. Asus TUF Gaming X670E Plus WiFi Ryzen 9 7950X 64GB (4x16GB) DDR5 5200 (running at 3600mhz) NVidia RTX 4090 FE Corsair RM1000e 1000W PSU GPU connected with CableMod 12VHPWR 4>1 adapter For a while, in my NZXT H7 Flow, i was using the NZXT vertical GPU bracket. But i kept getting this issue where out of nowhere, my display would go black and as far as i can tell, the fans on the 4090 (if not every fan in the computer) cranks up to 100%, and the lighting on the 4090 shuts off. But the computer itself didn't crash. A video that may have been playing at the time this happens can still be heard playing as if nothing happened. I thought to myself "Maybe it's an issue with the riser cable on the vert mount?" So i took the card out and put it directly in the slot. Seemed to have solved this issue, as it hadn't done it for well over a month now. Until yesterday. Computer was just sitting at the desktop when i went upstairs to grab something. Came back down and heard the fans cranked, and no lights on the GPU. I'm kinda leaning towards it being a PSU issue more than a GPU issue, but i could be wrong. Maybe also a possible motherboard issue? I'm assuming if the board for some reason suddenly drops it's connection to the PCI-E slot, there's a good chance it could cause the lighting on the card to go out? Or just unstable power from the PSU causes it to shut off to protect itself somehow? I'm at a loss. Never encountered anything like this in my many many years of PC building and ownership.