As per subject.
Looking for mining options to use come fall. I have cheap power($0.08 USD/KWH). Previously I was able to heat my home cheaper by mining than with the actual heaters in my friggin house. For the first winter I even made a hefty profit and kept the home nice and toasty but since GPU mining is more or less dead I sold off most of my gear. Whats out there these days that I should look into?
I'll probably fund the purchase using BTCJam so cost isn't an issue assuming the device actually has potential for a decent return.
Eight cent power and a heat benefit means you are close to six cent power.
So I would argue s-3 may make sense. Since the s-7 is not available. The s-5 is really loud and more than three times the price of the s-3.
An s-3 at 80 usd is 240 usd for 1200gh. The s-5 is more then 425 usd for 1150 gh one uses 950 watts the other uses 300 watts. So the s-5 saves you about 18-20 a month but costs you 210 usd extra up front