thanks for ur quick reply.
sorry i made a little mistake here.i cannot change my cpu before next year so 6790 and 550ti is not gonna work.
i thoght i5 system is better than quadcore
and if i buy a better card before the cpu which card should i go for 6790,6850,5850,6770,550ti or 460(i have to wait for this card more as it is costlier) or go for the 450,5770 or stick with my 5570?
as for brand the available brands are asus,xfx, msi,sapphire and mostly gigabyte(and sadly all the brands are from china in my country) so the best among them would be which one?
again thanks