Currently running 19" at 1440 x 900 with a 4850. I get 30+ fps in pretty much all games maxed out. I was wondering if I should switch over to a 5770 or a 5850. But will by VX450 be enough to handle them and will the upgrade make a big enough difference?
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I switched from a 4870 to 5850, and it was great! Although I was playing on 1920x1080, whereas your resolution could easily be taken by a 4850. I'd say unless you switch to a higher resolution, the 4850 would be perfect.