Well good news and bad news:
Got the other rig set up and went straight to 4 gpu to test it for the best.
It's running! All 4 at 820+kh/s per card and max of 80C (getting higher now that the room is getting warmer haha). I'm going to run it for a full day to see if it's stable.
If it is stable, then the bad news is that the first motherboard's pcie 1x #2 is bad. Contact Newegg I guess for a RMA? Hoping to see if there's an option for advance RMA for the motherboard to minimize downtime (I've already had enough downtime!)
I'll update you all tomorrow
