My results are 0.44w/GH par 11.1v
Under 11v. Miner starts but dies after a few minutes.
At 10v and lower, it doesn't start hashing., but you have access to the web interface.
Stock efficiency with the same PSU is 0.54w/GH
Yeah I don't think I've heard anyone claiming they would run under 10.8V. You have access to the web interface because it doesn't affect the controller it's probably BM1384 chip I/O of some kind or other.
We have a BM1384 on our breakout board running at 0.625V right now, which would be 9.375V into an S5. It's not a chip limitation, it's a miner design limitation.
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novak
Good to know that it's the design. Maybe a simple trick could allow lower voltage to the S5, then.
I'll have a look at an S5 board. I have one to RMA anyway, so it'll be removed from the unit today.
BTW, if the design wasn't good for lower voltage, it could have been upgraded for later batches, since it seems minor changes were made like changing the data conector from 16 to 18 pins...