People keep pricing the 25gh/s unit at $1300, which it is not. $1300 is for 25gh/s, a master board, and a raspberry pi. just for 1 25gh/s hashing board, it costs $500. Sure you can only buy a 25gh/s starter kit and that is all if you want... but.. this is stupid imo, buy some hashing boards.
yeah, but you need the master board to run the hashing board. How else are you going to get the hash out of a 500 dollar board? You need a starter kit at least
August H-boards were never available for sale. Only Kits.
So I'm pricing what I ordered.
If Dave offers an option for August customers to buy H-boards, we can talk about $500/board, until then, the cost of 25GH/s in August (?)
is $1400 ($1300+$100 for shipping).
BTW, $500 October(November) board will produce $13 loss by Jul 2014, after which it will mine at loss.
Either this calculator is too aggressive or we are buying a losing proposition.
Here's my latest calculation based on current stats for oct end delivery, very difficult decision either way. However credit must be given to buzzdave and team on how they handled the retail sales so far, compared to avalon/bfl/terrahash etc..it's night and day.
1) Assuming a 35% difficulty increase per 2016 block until Nov 1st delivery, this is very reasonable considering the massive amount of hashpower coming online during that time from all the asic hardware delivery from asicminer/bfl and avalon chips etc..not to mention the large farms coming online.
Starting difficulty at Nov 1: 50,000,000 * 1.35 * 1.35 * 1.35 * 1.35 * 1.35 = 224,000,000
2) Assuming btc price remains flat at average ~$110, also a reasonable assumption given the price history for the last few months.
3) Assuming only a 15% difficulty increase per cycle thereafter over the next 12 months from Nov 1 2013 to Nov 1 2014. I think this is a very conservative estimate given the amount of asic hardware/development coming online, lets just assume best case scenario and things will level off in the next 12 months and averages out at 15% per increase
Profitability decline for 12 months: 0.00948604
4) Putting it all into the final calculator with a starting date of Nov 1st per above:
Bitcoin Difficulty: 224,000,000
Hardware Cost: $8000
Hash Rate: see below
Profitability Decline: 0.009
Time Frame: 12 months
USD/BTC: 110
Ignore all power usage cost etc..
RESULT1 using 600GH: $11345.29, minus the $8000 hardware cost, ~ $3300 profit over 12 months.
RESULT2 using 400GH: $7590.89, minus the $8000 hardware cost, ~$400 loss over 12 months.
Of course it is a given if the difficulty per cycle goes up by even 1-2% profit will be wiped and if actual is lower then more profit, same goes for $ per btc etc..
again this is just my best estimate based on reality not some fantasy numbers...
As i said, very tough decision buy or not...