Hey guys, I recently purchased a used s7 off ebay and it came with 2 power supplies. The issue i am having is that each power supply only has 8 pci connectors.

Is it a bad idea to only attach 2 connectors to each hash board? It seemes to boot up but I'm hesitant to run it like rhis..

What id like to know is 1. Is this at all risky? 2. Does this reduce the efficiency of my miner? If any of these are yes, what do you guys suggest as a power supply? The official bitmain one, or something else?