5670 for starcraft 2

You should be able to. See following review which has benchmarks using:

ATI Catalyst:

Smoothvision HD: Anti-Aliasing: Use application settings/Box Filter
Catalyst A.I.: Standard
Mipmap Detail Level: High Quality
Wait for vertical refresh: Always Off
AAMode: Performance
Other settings: default

http://www.xbitlabs.com/articles/graphics/display/starcraft2-wings-of-liberty_4.html#sect0

SC_Mainstream.png

 

kimyeang88

Distinguished
Sep 17, 2010
100
0
18,710
if you play player vs player, it would be fine( depend on your resolution). However, my 5850 lag me(1680x1050) out when i play some custom game such as Desert Strike, Nexus, and couple other because of too many units appear on the map. Like 200+ and most of them fire rockets, spells.