Did I fry the gpu that isn’t working?
I changed the riser and switched around ports to see if it would change anything but just changes the location of the bad card.
All three are the same powercolor Red Devils. I tried flashing the chips from one of the other using hiveos but it has a rom read failure. It never worked since first boot btw.
OK! Problem solved! Very embarrassed but I didn’t know my 5700xt had dual boot bios. The GPU that wasn’t working had the switch half way thrown. In case anyone has this problem check your switch! Thanks for the help everyone!
I also have the same problem: 2 5700xt not OC recognized but do not start to mine, other 2 rtx3070 on the same rig are fine. Then, after a few minutes the system fizzes out and goes offline. Thanks to those who can help me.