Nobody throws away an Earthwatts 650. More than good enough for a single 460/470 with an OC'ed i7. (And RAID, and SSD, .... you get the picture). It's a keeper.
'Bout the RAM - Keep the 8 GBs only if you're looking at photo editing maybe. In that case, you might actually wanna add some more! For gaming, surfing & multimedia, as of now you dont need any more than 4.