I stumbled upon an article on Bitcoin today, and did some calculations.
Apparently, each Bitcoin is worth 17.5$.
Mining for Bitcoins is done in Mhash/s, and every 46 are worth 1$,
Which means that 800 Mhash/s (for one day) are worth 1 Bitcoin (or 17.5$).
As an example, an HD 6990 manages just around 800 Mhash/s, with a 400w peak power consumption.
Now the price of electricity ranges from 6 cents for a Kw/h to 18 cents, so let's take a median-high - 15 cents.
That's 400w x 24 = 9,600w / 1,000 = 9.6Kw/h x 15 cents = 144 cents = 1.44$.
Which equates to a Profit of 17.5$ - 1.5$ = 16$ per day, or 112$ per week, or 450$ per month.
Now you can scale that essentially up to any number (I assume).
Say you own two rigs with 8 HD 6990s, considering that the rest of the components run at idle.
That's 8 x 900 (overclocked) = 7,200 Mhash/s, with a typical power consumption of 2,400w-3,200w (let's say 2,800w).
That's 2800w x 24 = 67,200w / 1,000 = 67.2Kw/h x 15 cents = 1008 cents = 10$.
Now for the profit. 7,200 Mhash/s / 800 = 9 Bitcoins = 157.5$ - 10$ = 147.5$, or 1,032$ per week, or 4,130$ per month, and 50,000$ per year.
So now I'm going to wait for someone to poke a hole in my plan to make 50,000$ a year without doing any more work than simple maintenance and upkeep, minus original funds for purchasing the components.
Again, this is just something I found interesting as I love calculations
Apparently, each Bitcoin is worth 17.5$.
Mining for Bitcoins is done in Mhash/s, and every 46 are worth 1$,
Which means that 800 Mhash/s (for one day) are worth 1 Bitcoin (or 17.5$).
As an example, an HD 6990 manages just around 800 Mhash/s, with a 400w peak power consumption.
Now the price of electricity ranges from 6 cents for a Kw/h to 18 cents, so let's take a median-high - 15 cents.
That's 400w x 24 = 9,600w / 1,000 = 9.6Kw/h x 15 cents = 144 cents = 1.44$.
Which equates to a Profit of 17.5$ - 1.5$ = 16$ per day, or 112$ per week, or 450$ per month.
Now you can scale that essentially up to any number (I assume).
Say you own two rigs with 8 HD 6990s, considering that the rest of the components run at idle.
That's 8 x 900 (overclocked) = 7,200 Mhash/s, with a typical power consumption of 2,400w-3,200w (let's say 2,800w).
That's 2800w x 24 = 67,200w / 1,000 = 67.2Kw/h x 15 cents = 1008 cents = 10$.
Now for the profit. 7,200 Mhash/s / 800 = 9 Bitcoins = 157.5$ - 10$ = 147.5$, or 1,032$ per week, or 4,130$ per month, and 50,000$ per year.
So now I'm going to wait for someone to poke a hole in my plan to make 50,000$ a year without doing any more work than simple maintenance and upkeep, minus original funds for purchasing the components.
Again, this is just something I found interesting as I love calculations