Right. Assuming the Prismas' are $1500 cheaper and you'll mine ~$800 before the SP35 ships (start mining Oct 15th, end mining Nov 21st, 10c/kWh, 15% inc. per jump with a 5% lowering per jump), that gives you $2300 in hand with the Prismas vs the SP35.
From Nov 21st onward the difference in power is 11kW vs 7kW, so 4kW. There's 8760 hours in a year, so at 10c/kWhr it would take 2.62 years for the cost of powering the units to make up for the price differential.
At 15c/kWh, the numbers go down to 1.4 years of running before the difference in price is made up.
At 20c/kWh, don't bother. At the current price and next estimated difficulty (~35B), the network only has to increase 50% in size before you're at breakeven for power with $400/BTC which it very likely will be by the time you get your Prismas.
There is a small error on your post. The Prismas are not $1500 cheaper than 2xSP35. In my last post I wanted to say $1500 cheaper than Mabsark's price. The Prismas are only ~700$ cheaper than the 2xSP35 and with the ~$800 miner before SP35 ships that leaves only $1500 in hand which changes your calculations a bit.
But I appreciate your projection and I find it more honest than the other ones posted here. Thumbs up!
For crying out loud, you're not the brightest bulb are you? The conditions are not meant to be realistic, they're meant to remove all the variability so you can compare miners without having to guess at values. This provides you with base values which can then be modified based on your estimations of things like difficulty change.
Miners can't remove any variable when mining with equipment so your projection is useless. Why not use 10k$/BTC instead? It's not realistic, but it can definitely remove any discussion about ROI too. Mining IS a guessing game, but since you are not a miner you don't know that while being a shareholder all you need to focus is on pumping your company's products.
Given a 1 month head start for the Prismas in which they made 1,764 USD (after power costs), how long would it take SP35s to overtake the Prisma in total mining profits? Show you're working as well.
Please read MrTeal's above projection.
AM Prismas will NOT mine $1,764 USD in their first month. That is a pure bullshit straight lie to all customers reading it coming straight from an AM shareholder.I got slightly different numbers.
10 AM prismas = ~$7000/15TH
2.5 SP35 = $10,500/15TH
It seems that all AM shareholders like to be in a fantasy world instead of a real world. Having a 1/2 SP35 miner is impossible! Also 10 AM Prismas will NOT mine $1,500 in their first month! I am willing to bet 0.2 BTC on that! Care to take the bet and have someone who will buy prove it?