Warhammer 40,000 Dawn of War III PC performance review

AA Performance 

As we said on the previous page, Warhammer 40,000: Dawn of War III’s AA settings are extremely demanding with the game’s high setting almost halving performance of the same GPU using No AA. 

Those that want more performance in this game should disable AA immediately, though the low AA setting offers a minimal performance impact. Low AA uses FXAA, which offers fewer jaggies in games but has the unintentional side effect of blurring the final image, whether low AA or no AA is better is totally up to personal preference.