Tell us your full system specs...
CPU? RAM? PSU? MOBO? Monitor? Budget?
From those 3 cards above, HD5870 is the winner...
OK CPU - I3-550
Ram-2x2GB corsair DDR3 240pin XMS
PSU-A Corsair HX modular 620walts
Monitor-BenQ 21.5 inch V2220
Ok so in my country the prices are like this for the different cards(Converted to US)I plan to buy 1GB card
Actually Both 5850 n 5870 exceeded my budget.But if its good for the longrun then I may consider saving up for it.
So 1920x1080 resolution should be no problem with all 3 cards.
But AA and AF will not be good enough for 5770.
So if I dun mind that AA and AF is just half which should I go for.
I want a 5870 overall but its seriously a SUPER big difference in pricing.