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This question already has an answer here:

Is it possible to crossfire different cards? Like a Radeon 6950 and a Radeon 7970?

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marked as duplicate by Dave, ChrisF, Paul, Renan, Tog Mar 5 '13 at 13:51

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

up vote 3 down vote accepted

This image may help (which is not on the duplicate page). You may have to right click on the image and select 'View Image' (or similar depending on your browser) as it's small due to the dimensions of each post! This has the models you are after.

enter image description here Large image

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