Quick power #'s, measured with my best unit.. and the only one that will hit 500GH.
Corsair TX850 80plus bronze PSU - single S3:
218 mhz -- 450 GH -- 346 watt at the wall
225 mhz -- 480 GH -- 370 watt at the wall
237 mhz -- 500 GH -- 394 watt at the wall
I was a bit curious myself and tested one of my batch one units, but I'm getting different power numbers at the wall. See below:
218 mhz -- 440 GH -- 360 watt at the wall
225 mhz -- 387 GH -- 348 watt at the wall
237 mhz -- 408 GH -- 360 watt at the wall
250 mgh -- 424 GH -- 345 watt at the wall
I'm using a Corsair HX650 for each unit and testing using a Rosewill RHSP-13001. I've only tested one S3 thus far but there appears to be a power issue, or it's just not liking anything outside of stock frequency. I haven't flashed the firmware yet but am more concerned that I'm not pushing the same power to the unit at those higher frequencies. Any thoughts?