whoever has not received a coupon, i never received an email about having coupons credited to my account, yet when i was ready to checkout with two more S1's i was able to select 0.05btc coupons from a drop down menu. i had 4, i received coupons for my 0.64btc s1 buys aswell apparently.

^thats more-or-less my plan too     maybe 2 months of full speed unless the summertime deems otherwise

Tempting... but still not a good deal. Sorry Bitmain.

Take a look at my spreadsheet, play with the editable cells and see for yourself.

Unless the S1's are recyclable in 2015?...

https://docs.google.com/spreadsheets/d/1giwtVGpz19QOZvGuCWsHgyPfpOM4Zh8-Rgk0jvAHdGM/edit?usp=sharing

Average past difficulty jumps: 23% every 12 days.
Difficulty estimation: jumps 15% every 12 days.  But you can change that also in second sheet.

Comments are welcome. I'm always looking to improve everything. 

- Kex.

Looks good.  Kinda like the numbers I put together.  I lease some of my ants out which helps close the gap.  Sometimes you can mine alts and sell at

really good returns vs. Bitcoin.

Underclocking to reduce power usage helps too.

Thanks! You're right, there's more you can do to close the gap and selling GH/s on eBay is something to consider when selling 4 x the mining results. As for mining alts, you have to carefully choose which one.

I tried selling my S1's but that's not an easy task. S1's were easier to sell in Feb. than today. The problem is not the price, it's the usefulness of the machine itself... by the end of the year, it will produce 0.0008 BTC per day if diff. increases by 15% which is far from sure.

But hey, we're part of it! We were there! We'll have stories to tell our grand-children in a few decades!

- Kex.

Ive got 5 Ants I have had for a while running at 1 TH/s.

They are rock solid machines.

3 run off of Corsair RM550s, not much to spare there.
2 run off of Corsair RM650s.

Hey, I can squeeze 1 more ant in running 1 of the boards off each of the RM650s!

At BTC0.50 with one of my coupons and the power already available I could not resist.

All I need is 2 PCIe power cables (I have cat 5) and I'm good to go.

Hoping for a good Ant, have not had any problems before, but it seems the may be some new issues, I'll know in a few days.

its not the best solution, but you could run a few 14 or 16AWG wires from the screw terminals of the existing units to the screw terminals of the new unit. This would share the load to the PSU, but also force the PCI cables to handle more power than they do currently

ie: you have 1 unit running on a 650W psu. run a pair (1 black, 1 yellow) of 14/16awg wires from each of its blades to a single blade on the new unit. (ie: 4 wires into the screw terminals of a new blade). This would add about ~90W of load to each blade's PCI cables on the first unit which may be pushing its limits but not excessively.  repeat for the second blade using the other unit and other RM650

... Dang it bitmain.. you are really tempting me to buy more S1's!

Bitmain now requires signature (why???), so UPS tried to deliver my units at 2pm. I missed it, of course. Darn it!
I will have to go to the local hub tomorrow. Nothing could be done today. Cost me lunch money or so.

I have several S2 $400 coupons and several 0.05 S1 coupons, and I doubt I will use any of them.

I will order miners for people using my coupons if you pay me in advance. No charge for the coupons but tips welcome.