Re: High Efficiency FPGA & ASIC Bitcoin Mining Devices https://BTCFPGA.com

Quote from: bobitza on October 19, 2012, 07:37:30 PM

Quote from: gmaxwell on October 19, 2012, 05:48:40 PM

The people who have the view that the power doesn't matter only have it because they have high profitability expectations. The people saying that power is all that matters are expecting very long payoff horizons due to difficulty increases. I think the latter view is safer and also more correct, especially if you're not counting on being very early in your deployment.

Well summarized.

And mybe epoch is right and thinking too long term doesn't make sense and instead we should focus on Gh/$. What if you have similar Gh/$ offers? Wouldn't you go for the one with best Gh/W?

Depends on other factors as well, delivery time being the biggest. Cablepair has said he could do up to 1000 units in the first batch the he planned to have shipping the week after Thanksgiving, and as far as I know that number hasn't been reached yet. BFL has a much larger list of preorders; if an order placed today doesn't ship until January that's a pretty huge difference. If the bASIC is consuming 150W@54GH/s, and you got it Dec 1 vs Jan 1 for a BFL Single, you would make $284 in December assuming an average difficulty of 250TH/s. That's enough to pay for electricity @ 150W and $0.15/kWh for 17 months.

Other things to consider are the company's track record and what else is offered. If BFL's SC singles are anything like the FPGA ones, it's pretty likely that they'll look the nicest of the new generation products sitting on a desk, so that could be a factor for you as well.