I come from an HD 5850 and although today they may be discontinued, I can tell you that it is a card that performs very well; games like Max Payne 3, Crysis 2, etc... run smoothly and at high settings.
If you are an eBay user, take a look around because you might find one second-hand at a very good price.

Joder entonces es eso. Perdon por mi ignorancia, bueno me hare con la versión de 32 para probar. Gracias Fassou