My friend hosting them said and sent pics that each one is on a singular supply of 650W or greater with each miner using all four power ports.
Should I find out the specific PSU not that I think it matters with each one being 650w or greater.
Edit:
--- And are you using two separate 6-pin PCI power connectors for each blade (not daisy-chain style) or only one?
I actually just shot him an email about this but do you mean four cables using four ports on both the miner and PSU ?
I also dont get the beefier thing.
Actually, it does matter - I have an 850 Watt PSU that can't handle OC'ing a single S3 (barely handles stock speeds). It loses hash compared to now that I run the 850 one one blade using two separate cables from the PSU (i.e. not a single cable from the PSU that has two 6-pin PCI connectors) and one 600 on the other blade.
"beefier" just means more stout, stronger, tougher - in this case, more stable and more able to hand a hard, steady drain.
Yep, a single 650 will likely not be able to handle OC'ing one S3. IMHO.
You only need to read a few pages back to discover that miners (including myself) have successfully been OC'ing S3s with mere 500W PSUs with only 2 PCIe power inputs.