Quote from: fontline on December 30, 2014, 02:25:56 PM

bitmain wrote its possible to run s5 at 0.2w/ghs (less hashrate) with a 9v psu. is there a way to test it?

yes but I won't be able to try it for a while. this psu

http://www.ebay.com/itm/400-Watt-Adj-Volts-9-15-DC-36-Amp-HAM-CB-Power-Supply-Real-USA-MegaWatt-/180777043955?pt=US_Radio_Comm_Device_Power_Supplies&hash=item2a1726c7f3

can provide 360 watts 24/7/365 so with it lowered to 9 or 10 volts and freq lowered to 200 or 225 on an s-5 you should get low numbers.

the problem is this psu is around 80% efficient so if you use a 92 efficient evga 1300 g2 and 12/12 volts or a 80 percent efficient megawatt 9/12 volts

you make out with the 9/12 volts ratio and lose out with the 80/92 efficient psu ratio

simple math is 9/12 x 100 = 75 then 92 /80 x 75 = 86.25 still better then the 100 but not as good as 75

once you add in the price of the psu vs an atx you have in house it kind of does not pay.

I have talked with a forum member about a down volt 'pot' device this would be about 87 % vs the 80% of the megawatt psu.

he may Post about this device in a week or so.

@ jelin1984

stock fan is 120mm by 38mm . my push delta is 120mm by 38mm my pull silverstone is 140mm by 38mm but has 120 mm fan holes.

my fans kept the temps at 60 and 57 with freq 350 my watts were at .5 and hash at 1154 hw were good

so I now went to freq 356 will get back later.