This device shows no video output at all.
This device shows no video output at all.
Did you verify the pins in the CPU socket? If there are no issues with the socket, I’d consider sending back the CPU and mainboard for replacement. It could be either one or both, but it’s hard to confirm without a spare CPU to test on that board or another. As long as it doesn’t display any error, I’d leave the GPU installed. By the way, you didn’t mention the PSU you’re using.
I'm experiencing the same problem right now after installing drivers from the USB drive. Initially thought it was related to the GPU (RTX 4090) or its driver, so I purchased a $60 one and rebuilt the system from scratch with the new card. The issue resurfaced during a fresh OS installation and driver reinstall. I'm considering the motherboard drivers as the likely cause.