Yea if you want to buy a new power supply, for about 10 to 20 dollars more get a 4770.
great performance and low power draw.. the 4770 will use from 70-80 watts fully stressed the 4850 will use 110-120 watts.. and you can expect about 15-20 fps more from the 4850 but its not a big deal... check 0ut this site
Or you can wait a bit for the 5750 512MB version to come out and get around the same performance level for $10 more... but you get DX11, Eyefinity, and lower power consumption.
Message edited by vjcsmoke on 10-22-2009 at 06:40:31 AM