Well the S3's destroyed my Thermaltake 600W PSUs which had previously been powering cubes without any issues. They ran fine with them for about 30 minutes although cables were getting pretty hot, not 100% sure why it killed them yet. One PSU went peacefully, the other gave a nice fireworks display.

Ended up using a Corsair RM1000 to power both and they have been running pretty good since, with no hot cables.

For the past few days one S3 was only avging 380GHs and showed no 'x' and everything looked fine but after a reboot it kicked it somewhat back in gear. Currently around 430GHs avg now. The other has been running fine avging 440GHs. No overclocking attempts at this point.
Thanks for replying, I'm hoping some more will share stories.
Which model thermaltake psu was that? You used it for only one unit?
This is the main reason I am on the search for a quality PSU which can handle the proper power on the 12V rail. I'm worried about using split pci-e cables because 24/7 operation and hot cables doesn't always end up good

Problem for me searching is the amount of PCI-e cables that actually come with most sub 1000w psu. I might end up getting a handful of the molex to PCI-e adapters
