Can you Xfire 2 different cards (e.g. a 4870 & a 4850)?

[rafer]

Simple though potentially stupid question. I ditched pc gaming for consoles when the old P4 i system I built in 2002 gave up on life in 06, so I'm a bit oblivious when it comes to this dual and tri gpu thing.

While I'm asking, same question goes for SLI.

 

[mactronix]

4850 and 4870 yes dont know about Nvidia cards though.
As far as the AMD/ATI cards go this should tell you all you need to know. http://game.amd.com/us-en/crossfirex_about.aspx

Mactronix