Help! I moved my rigs to a new location and lost 40% of my hashrate

I have 2 rigs running. Due to heat I recently moved them from my home to a workshop. I disconnected all the GPUs for this move but made sure to document which slots they came from and put them back in the same place. I Plugged them in at the new location and got everything up and running. I didn't make any software changes. I sat them down, plugged it all back in and turned it on, I had to rebenchmark one of them but the other was fine. However all of my RX 580s and 480s (on two separate machines) went from hashing at 24 down to 15. The NVIDEA cards do not seem to have the problem. Any ideas? I would point to the internet connection but the connection is fine. Plenty of juice and there is a third machine on site that has the same problem but he turned it over to linux and it is back at 24. What is going on here? I have racked my brain and can't come up with anything.