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the real question is crypto still profitable
depends on energy and hardware coststhe real question is crypto still profitable
Well if you belive in the future it will swing back upwards here in the next 2 years as they run out of mine able bit coins. When they do the price should shoot up to the moon...
If the market does not collapse...
and the best way to mine was mine script and trade to btc...
If you look around at this site section you will realize that there really are no actively vocal miners here any longer.
Which should tell you that most here have given up on the poor profitability.
That being said, if you can run two off one PSU to save upfront cost, that's what you should do.
If you don't have basically free electricity, the pennies you will save in efficiency by using two supplies would take months to recoup via mining.
I think the best Power Supply totally depends on how many S5's you plan to run.
The Corsair CX750M is very popular and its on sale for $40
http://hardforum.com/showthread.php?t=1864188
It's not terribly efficient and will only power a single S5 but its cheap and gets the job done, I've used over 20 of them and never had one burn out running 24/7.
You can also explore the 1300 or 1600 G2 by EVGA I've seen them run 2 S5's on those PSUs.
Another popular option that I have recently begun to do is run Server Power Supplies with breakout boards. (see: http://www.gigampz.com/)
Miner since 2010, still mining and still making money
Also check out the bitcointalk.org forum, miners on this forum have either migrated there or stopped mining.