new firmware update posted today one of the changes is increased voltage to 760 This is the fix you all are looking for so I suggest anyone with flaky performance on there C1's do this update. I pushed my voltage up to match the new update and my miner is running even better then it was a 745 volts
It's worth noting that this will increase your w/gh power draw
were talking about a few watts nothing to get frustrated about if your looking to offset the gains in Voltage you can use a larger radiator and or longer runs of pipe and drop 1 of the 3 fans or all 3 if you have it big enough this will cut down on power draw to the fans and offset the few extra watts the chips will draw. This unit is the same as an S3 but overclocked from the factory it was never sold as a unit with the lowest watt/gh ratio just my thoughts on the matter I have all my S3's over clocked for extra GH not as worried about power draw as the others I guess