Those estimates on mining days to replay the card is absurd, unless you meant something else.
That was supposed to indicate the amount of time it would take with no help.
i.e. with only my 4850.
As difficulty increases, you're not very likely (if it continues like this) to mine even 10 BTC within the next 5 years with this card!
Exactly why I am offering a 20% return on any investments.
My hardware is abysmal.
If you are near your computer while mining with 2 cards, you want to make sure there is atleast 2 spaces between cards for air.
Luckily I live somewhere very cold,
and my case has quite nice airflow (Antec 300).