Quote from: deisik on November 27, 2015, 03:46:38 PM

Quote from: Amph on November 27, 2015, 11:22:20 AM

Quote from: deisik on November 27, 2015, 08:27:57 AM

Quote from: Amph on November 27, 2015, 07:53:52 AM

Quote from: deisik on November 26, 2015, 08:10:21 PM

It seems that your definition of efficiency is heavily lopsided. My understanding of efficiency is entirely economic, i.e. I don't care about power consumption and hashrates as such. All I care is the balance of costs and revenues. In other words, the miner that incurs less cost and brings in more revenue is more efficient (i.e. does more with less) than the one that does the opposite...

That's what all technical parameters ultimately boil down to

my definition is different, talking about the initial investment as efficiency is a no-sense, the efficiency is only related to consumption, and the s7 consume half of the s5, so x2 efficiency

The problem is it doesn't in the least guarantee that with an s7 you will profit twice as much as with an s5 given only its half as much power consumption. Initial investment (aka capital expenditure) as a part of fixed costs defines your break-even point. You still have to shell out on the equipment first, whether you love it or not. Your personal opinion (lol) that you can sell your miner is not related to this, and I highly doubt that you will get for it the same price which you bought it at after a few months of operation (and more so before the halving)...

Even if you personally will be lucky to sell your device at its original price tag

in fact the profit is much higher than a s5, becuse you need also more psu for the s5 since it consume more

i've done the math about it and it was highly in favor of the s7

Okay, but the question was not about "weighing" the new devices (s7) against the old ones (s5) in the current conditions in the industry. The question was whether the new miners will be as profitable after the halving as the old miners are today, i.e. before the halving...

To put it differently, will the new equipment make up for the loss of revenue due to halving?

yeah it will, and by a by far, i've done a good post about this in the speculation section, the result was 75 in profit for the s7 even after the halving

https://bitcointalk.org/index.php?topic=1255965.msg13083425#msg13083425