Mixing graphic cards in crossfire?

[Plt Off JRB Meaker]

Ok,I have at present 2 x HD 5570's,but I want to upgrade at some point soon.

I want to know if I swap one of my cards for a better card that the other will still work in crossfire,let's say I mix a HD 5570 with a HD 6970 will this work?

Or should I just sell both cards and start over clean,I'm puzzled,please advise,thanks........COD is forcing me to sort this out,lol.

[Extreme_One]

GPU in the same series can be crossfired with each other. So a 5800 series GPU (e.g. a 5830) can run together with another 5800 series GPU (e.g. 5870). However GPU's not in the same hundred series cannot be crossfired successfully. (e.g. a 5770 cannot run with a 5870)

http://en.wikipedia.org/wiki/AMD_CrossFire

[Plt Off JRB Meaker]

Excellent,Extreme one,this explains it really well,thanks very much.