How can the unit draw 1Kw and only have a 1Kw PSU ?
If you buy an s-2 I advise you to pull 1 blade and list it on ebay for a high price. say 350 usd. Slowly drop the price if it does not sell.
As long as you get more then 250 the price is not bad. having 9 blades will allow the stock psu to not fry and die. getting 250 or more for the blade will make up for the lost hash.
do the math what does 100gh earn.
and the math shows the 100gh lost does not pay off 250 usd so selling it for 250 usd works out as the best move.
bottom line is the s-2 is not a great buy. it needs to be priced lower
Bitmain is a shrewd businessman - that is clear. He knows at this price the S2 will not ROI - watch for the price drop coming soon which will blow the S1 out of the water. This is typical businessmanship. I like this guy.