[nly]

I work this out to be about 180 Mhash/J, which is 80-100x more energy efficient than any GPU mining.

Also, for anyone wondering: At current difficulty and rate of exchange this will cost you <$0.10 a day to run and generate $40 of Bitcoin.

[makomk]

Also 1/5th the energy efficiency that BFL originally promised when taking orders, and their most vocal spokesperson claimed that there was no way that they'd be significantly more power-hungry than predicted, that anyone who suggested otherwise was trolling, and that the only reason to draw attention to the fiasco when their FPGA mining hardware which was announced with impressive efficiency and blew out the power budget so badly they had to redesign the boards was to shill or troll. Right up until they blew their power budget and had to redesign the ASIC boards.

Additionally, he tried to convince people to buy BFL rather than one of the competing boards by arguing it was so much more power efficient miners using them would be forced to shut down. It's barely more power efficient than ASICs which shipped months ago, and those companies are already looking at newer models.

Oh, for what it's worth that's also less than 10x the power efficiency of the best FPGA boards...

[fiatpandas]

$40 per day?

[DougWebb]

I estimate it'd produce around 0.25 BTC/day, mining in a pool. That's about $30/day USD at today's price.

As ASICs come online, the difficulty is going to go up, which will reduce the daily generation rate for any given miner. I've been trying to decide whether or not to order a device now based on my profitability prediction for months from now when I might actually get it. I'm guessing by the time I get one I might be able to produce at least 0.05 BTC/day. Assuming that's $6/day, the $274 device will take about six weeks to pay for itself. Not too bad, but I don't know if keeping tabs on it afterwards is worth it for $6/day. It'd only be worth it if I think BTC are going to be worth a lot more in the future... getting back to hoarding coins as an investment rather than using them as currency.

[vl]

>getting back to hoarding coins as an investment rather than using them as currency

But then, may be it's better just to hoard BTC directly right now by reallocating thousands of dollars required for device? Can't decide for myself.

[nly]

Yes, sorry.

[Tichy]

Yes?