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
