I don't think 2x 4870x2 is a good setup since they'll usually produce a LOTs HEAT and noise...
Your PSU is enough to run quad 4870 without problem.
May I know the other specs? CPU? Mobo? Monitor?
I prefer a single powerful card, so a single 6970 is much better choice if you ask me...
3.6 quad core, 4 gigs ram 1600, and currently have a 4890 but can sell for 100 bucks....antec 900 2, really nice airflow on my case, in normal use as in forum browising and such is never goes above 39 temps, A50 cpu cooler
its actually cheaper getting the quad fire lol cant believe its gone from 500 bucks to 150 in a couple of years...anyways, do u know what the fps diffrence would be?
1900x1200 with a 24" and 870 G45 but id upgrade to make it future proof also and get a 2.5k oc at like 4 something