Originally Posted by Jake Harris
The 940 With a 790G And 4GB Of RAM will last you a couple year's and will be very powerful. Just add on a 4780 X2 and you'll be able to play any game on the market.
Don't get a 4870 x2 unless you are running 2560 x 1600 resolution you will not see much of a difference from the 4870 1gb unless you are running maxed out on a 30+ inch screen. But to be honest if you are just an occasional gaming the 1gb is even going to be too much for you.
There is a few good board brands: Gigabyte, MSI, ASUS, EVGA, just to name a few... I personally have a Biostar which doesn't really have good ratings on new egg but has been "phenomenal" lol @ the pun ( I got a phenom II) I got it when there was a combo deal with the Phenom II's.
If you are going to get 4gb's of ram make sure you get a 64 bit OS in order to use it all. You really aren't going to lose much maybe a .5 GB's which really isn't going to make that much of a difference in everyday use.