Quote from: hdmediaservices on October 25, 2016, 11:47:23 PM

Quote from: Rabinovitch on October 25, 2016, 07:18:15 AM

Well, I would like to get one unit at $1800 + shipping. Where to send my bitcoins? Grin

Seriously, will there be a real group buy?

Wow - you are willing to spend $1800 + shipping + PSU for this unit? How do you intend to make your ROI?

As opposed to the original Titan pricing at $9995 (IIRC), and USED ones going for $2000 ballpark with NO warrenttee?

DO keep in mind that a good power supply will last for a VERY long time, and can almost definitely be recycled to another usage when the miner becomes unprofitable or dies.

For reference - I paid $800 (appx) for my 110Mh/s A2 units back in November - and they've ALREADY paid for themselves (despite semi-high electric rate usage before I moved in June/July).
My A2 units are STILL PROFITABLE as well - I just don't have enough power available where I am at now to run them all.

I don't see the A4 taking forever to achieve ROI, though I do figure the increase in network hashrate might kick their ROI timeframe into the "ballpark a year" range.

In theory, you could run each "blade" of an A4 from a seperate power supply - just don't try to use 2 different power supplies on the same blade - and it should work fine.
Optimally, though, a big enough PS to run the whole unit form one supply would be best.

Given the STATED "at the wall" consumption mentioned earlier in the thread by the guy that already recieved his unit, my favorite Seasonic X1250 or the widely-used EVGA 1300 G2 power supplies should run an A4 unit VERY comfortably - my 110 Mh/s A2 units consume 1240-1260 watts "at the wall" for the ones that have X1250 transplants and have been running rock-solid for months now.

Keep in mind that the rating on a power supply is it's rating for OUTPUT, not how much it is limited to on input from your AC source. Given a typical 90% or so conversion efficiency on a gold-rated PS, you have at least an extra 10% margin to work with when looking at "at the wall" figures vs the rating of the PS itself.

The days of "2-3 months to achieve ROI" may have been gone in cryptomining for years, but it can STILL be a very good and high-return investment if you do it wisely - and have low electric cost.

1 Year for ROI is NOT unreasonable now, since the ASIC "state of the art" has now caught up with overall semiconductor "state of the art" and we can anticipate product cycles moving to MULTI YEARS apart instead of well UNDER a year per generation (for Bitcoin which has more competition, Scrypt cycles have been a lot slower due to the much smaller market for Scrypt miners).