I have my eye set on a sapphire hd 7850 2gb graphics card, one problem is there seem to be 3 or 4 versions of this card and im unsure on which is best and what the main differences are.
1) 11200-07-21G £138
2) 11200-14-20G £146
3) 11200-07-20G £160
Now i believe they all have the same outputs. 1 hdmi, 1 dual link dvi, 2 x mini display port?
Im guessing the key or only difference is the clock speed but i cant work out which is which unlrss i go off price. The sapphire website allows comparison but it doesnt list the model numbers so theres no way to tell which is which. im quite happy to go with the cheapest but id still like to know what the differences are.
Is there a 4th card also.


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