Hello, I turned on my mining rig a few weeks ago (all 1070s) and have an issue after one of my risers died on me. I decided to plug the gpu into the 16x slot of the motherboard. It was working fine for a few days until today. I checked every single riser, cable, gpu, and they all work. But as soon as I plug a gpu into the motherboard it's not recognized (windows says it could't load the drivers and theres a yellow "?").

tl;dr:

• one of my risers died, so i moved the gpu to the motherboard, it worked for a few days but not any more
• the gpu on the mobo works and it mines by itself
• As soon as I plug a gpu with riser the gpu plugged on the motherboard stops working

Anybody with more experience can help out? Thank you.