I have used my HD4850 for a long time and almost a year ago I bought a HD7870.
Friends of mine started to mine LiteCoins and I started to find some interest in it. So I also wanted to mine.
One of them said you could use your old Graphics Card and mine on that while the other can still be used to play games.
So I tried to plug in my HD4850 and everything went alright till I started my Computer and landed on desktop.
Catalyst Control Center said I had the wrong driver for the appropriate hardware.
Now my question is, is it possible to use my HD4850 as a secondary GPU?
NOTE: I did NOT use a crossfire cable for it.