Quote from: Bonam on October 07, 2014, 05:30:23 PM

Quote from: Puppet on October 07, 2014, 07:43:38 AM

Quote from: Bonam on October 06, 2014, 05:42:52 PM

Doesn't matter what the J/GH is if you can never recover the capital cost of miners even with free electricity, which is where bitcoin mining stands right now.

You couldnt be more wrong. Here is a chart for you:

It shows the network speed where miners would break even after 2 years using the listed assumed variables. Even in the current climate and with current efficiency, we are no were near where (industrial) mining would not be profitable. And the effect of power efficiency is quite dramatic if you consider reasonable electricity cost price ranges (~0.06 / KWh)

What % difficulty increase per period are you assuming in your calculations?

It's not a difficulty prediction tool, it's an endgame estimation tool.

If we know the $/gh, w/gh, and $/kwh we can estimate how much hashrate it would take before nobody could afford to continue adding hashing power. (but not when or at what rate)

We don't know the variable so it's only a guess but his point is clear that J/GH does make a huge difference.