Witch hd6990 should I buy?

thought about buying a hd6990 graphics card for my new computer, and there are several different versions of the card there is an asus one gigabyte a Sapphire a xfx and there is certainly more out there

so what is the difference between them?



and witch one should i buy?|||You may follow this sequence.

1) Gigabyte ($739.99)

2) Asus

3) Shapphire

4) XFX ($734.99)

5) HIS ($722.99)

6) Powecolor



Though the main factor you should consider is which manufacturer have the nearest service station for your graphic card. & other factor to be considered is cost of graphic card.



You can find the specification on below mentioned link

http://www.hisdigital.com/un/product2-60…



Hope you find your solution.

Have a good day. :-)|||ATI Radeon is better