I am having a very weird issue. I just set up my 2nd miner with the following specs

ASUS Prime Z270-A mobo
8GB ram
5 MSI RX580 Gaming X 8G GPU
SSD drive
Windows 10
Blockchain driver
1000W EVGA PSU gold+

All pretty standard stuff. I flashed all the GPUs and updated bios on the mobo and turned on 4G, etc. Everything is running correctly while it is plugged into ethernet. I ran Claymore 10.2 and all 5 cards shows up and running with around 29.5Mh/s. I let it run for about an hr and all is good. I then switched the network to a wifi repeater and plugged the rig into the wifi repeater via ethernet and let that run for 30 mins and everything is still fine.

So now I pick up the rig and move it to another location to run it as headless with the wifi repeater next to it and all hell broke lose. Claymore hangs with GPU0, restart miner messages. Figured out with card is GPU0, unplugged. Thought maybe it was a bad riser. Reboot, same thing. GPU0(represented by a different card now) hangs, restart miner. Unplug again and reboot, now getting GPU0, GPU2 hang errors. Also claymore takes forever to startup. When all 5 cards were running, it was drawing about 750W at the wall. So definitely not a power issue. It had the same hang issue when I only have 4 cards plugged in.

I haven't moved it back to my bench yet and plugged the monitor back in. But does going headless with Win10 affect how claymore sees the cards? Any ideas?

Thanks in advance!