I am think of getting a 5750 cauz im low on money and get another one if starcraft2 requires more. I currently have a 3870x2 and its really loud. CPU is phenom 9850 qc. BTW 1000w powersupply and 2 * x16 crossfire motherboard.
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I actually think the 5770 should be pretty good for starcraft II not sure why...though....xD