Having any issue. Using Claymore dual miner v9.5

Yesterday I inadvertently restarted a machine that had been symptom free for more than 100 hours. After restart 4 of my GPUs were reading between 27-28 Mh/s and the 5th was just over 4 Mh/s. I disabled that miner, isolated it and ran it by itself. The card hashes ~27 Mh/s by itself. Plugged them in one by one and until I get to the 5th card everything runs normal.

I moved to another machine, different motherboard different cards and the same thing is happening to this machine now as well.

Can anyone offer an explanation?