My 4850 1gb works great, but it draws too much power compare to the new 5xxx line, I already replaced the weak-sauce 450w PSU with a good 750W corsair, once the 5770 price goes back around its MSRP, Im going to get 2 of those and cross-fire

. 2 x 5770 power draw = 1 4850 , performance wise is close to 5890 .
jpnielsen , 1) the lates bio will unlock more features for our i7 , well not manditory its recommended .
2) make sure yours is ddr3 ram not ddr2 , and if you install 4 sticks of memory , you will lose tri-channel memory config, don't know how much of a performance loss though.