No. not possible to CF cards from different architectures and generations.
can i crossfire a hd4850 with a hd7850
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Wich cards are compatible together?
No, they can't be different gen cards, you can CF any 2 7850's or any 2 4850's, but not a 4850 and a 7850. You may also want to note they they don't have to be the same brand to CF them, just the same model
So it has to be exactly the same model?
Ideally yes.
It can be from a different manufacturer but the core and memory clocks have to match.
It can be from a different manufacturer but the core and memory clocks have to match.
Not sure why you would want to anyway..
Read this:
http://sites.amd.com/PublishingImages/Public/Graphic_Illustrations/WebBannerJPEG/AMD_CrossfireX_Chart_1618W.jpg
Read this:
http://sites.amd.com/PublishingImages/Public/Graphic_Illustrations/WebBannerJPEG/AMD_CrossfireX_Chart_1618W.jpg
can be any 7850 or any 7870 to work
The charts helpful
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