Hello,
I recently put together a new build with a Ryzen 5 7600x, an MSI b650s WIFI MoBo, and an RX 7600XT. I have a 5-month old 700W PSU in this and is working fine. I've had this GPU and PSU in a previous (much worse) build for over 5 months and neither have ever given me problems.
Everything booted fine and ran perfectly well and there were no problems at the start. I had 2 monitors connected to the GPU, one DP and one HDMI. Both went black (after running a game for over 30 minutes) and said no signal very suddenly. The integrated graphics work so I know its not a monitor/cable problem. There is power to the GPU as it's warm and the fans are spinning. Task manager and AMD Adrenalin software both don't detect the GPU but MSI Afterburner and Windows System Information do. I've removed and reseated the GPU multiple times, tried multiple power cables, and nothing works. All drivers were updated before it stopped working.
Any help would be greatly appreciated.