and suck more power from your wall and cost more for electric lol.

What watt meter did you use to get your information or are you just using printed specifications.

You can't from the unit's side as there is no adjustable voltage [or any true DC/DC], you'd have to modify the PSU's 12V input higher which isn't going to happen with a normal PSU.

0.4375W/GH/s    Only in your dreams.


Hash Rate: 1150 GH/s     0.53W/GHs  


...any hardware modification will void Bitmain Warranty Qualification.....

Specifications

Hash Rate: 1155 GH/s ±5%
Power Consumption: 590 W (at the wall)
Power Efficiency: 0.51 J/GH (at the wall)
Rated Voltage: 12V
Dimensions: 298 mm x 137 mm x 155 mm
Cooling: 1x 12038 fan
Operating Conditions: 0 °C to 35 °C
Certified By: FCC CE
Network Connection: Ethernet 

Notes

1.   Power consumption figures vary with your PSU’s efficiency, the ambient operating temperature and the accuracy of the power meter.
2.   PSU: A power supply unit is not included, and you will need to provide an ATX PSU. There are 4 PCI-e connectors for +12V DC input and all four are required. Do not connect more than one PSU to the same hashing board.

Bitmain by increasing their price will cause sales of sp20 to go up.

here is the reason:
3 s5 to the usa cost $1140
performance 1150 GH/s

$ per GH/s 0.33

for the s20 since shipping is free total $1200
performance 1700 GH/s 0.23

much better performance per dollar.

in terms of electric efficiency, since basically they cost about the same after shipping $380 vs $400, it would be fair to compare them at the same performance, the sp20 undervolted to provide 1150GH/s would probably give similar consumption.
Someone with an sp20 would provide that info.

But after the price increase for the S5 the SP20 is a much better choice, I am sure bitmain will be force to drop their prices in less than a week from now.

if we use the $ per GH/s ratio of 0.23, for the S5 to be able to compete against the S20, the S5 would have to be priced at $264 including shipping, but since it does not include shipping it would have to be priced at $224, at nearly double this price it is no match for the SP20, I was hoping bitmain would lower their prices against the competition, but instead they were increased, this is a very bad indication that they are loosing ground. I would think in less than a month assuming spoondolies does not lower their price would have to be prices around $200 otherwise spoondolies will get all the sales, now if spoondolies lowers their price, the sp20 will have all the market for themselves at least for a while.

I am comparing in a group of 3 since that is something that most miners could do easily and provides best price for sp20, for the S5 the group is 52 units which is way to large for most of us.

I agree. Was waiting on bitmain to make a move to match the sp20 price drop. Just put in an order for 3x sp20 instead, and they accept paypal too.

Well, if your brother has this meter then if you don't have it now then you can easily get it back shortly.  I'd like to see a pic. of this meter with that reading on it.  Sorry if I don't believe you, especially if this is in a 120v country.  I've got a voltage step up converter that puts out 230v which should be about 2% more efficient.  My meter shows about 1,060-1,070 watts for two S5's (that's 530 to 535watts each) downclocked to 312.5M (1,030 Gh/s) on a 1500w TITANIUM RATED power supply.  So I don't think it's possible that you are getting on a S5 1,200Gh/s on 525watts (no matter what your ambient temp. is).  

You know the answer to this already, 12V. No one else is going to officially validate that anything above 12V is safe.