I'm looking for a replacement for my old card. It's for gaming mostly and I like to crank up the detail everywhere so the one I have just doesn't do well enough for me with the resolution I use.
I don't have much experience with Nvidia cards and I've thought about the HD 5850. Never had a crossfire setup so far but it's not out of the question, as long as I can keep the cost somewhere around 300-400. Must has excellent performance
I am running: Antec 900 Asus P6T Sapphire HD 4850 1GB Corsair HX620W i7 920 @ 3.36GHz Asus VK266H 25.5" @ 1920x1200
Should I maybe also have a better PSU?
More aboutupgrading 4850
Your PSU is fine. It can run a 5850 or a 5870 without much trouble.
Crossfire is pushing it for 2x5850, but possible. How many amps do you have on the 12v rails?
Crossfire with 2x5870s on a 620watt PSU is not possible.