SFARDS
Bitcoin single mining mode:
Hashing power 1700 GHS, power consumption 770W
Spondoolies SP20
1.7 TH/s ± 10%
The SP20, if it could do 1.7 TH/s [Not all can] would use almost twice the wattage as the SF100. That's if you are just looking at the wattage on the BTC side of the SF100.
While the quoted SP20 rate is 1700GH, it's really more like 1500GH as a regular, predictable, not terribly efficient, and loud miner. While I like the SP20, the advertised rate of 1700GH is more a marketing value, than a practical value.
To be completely fair, we have zero idea what the realities of the SFARD 100 are in terms of sound and reliability, beyond the quoted rate and power value. Until a trustworthy guy here has put one in his home and turned it on, with a Kilo-Watt meter I'll take the quoted figures with a grain of salt.
Do we even know if it requires a power supply, and if so what kind of connection (e.g. PCIE 6-wire)? It's also unclear if the 770W (BTC only) figure is measured "at the wall" or what.
Lot's of questions to answer, and verification to happen.