if you have zero choice in budget the 6670 is not a bad card...but if u could i would try to save some of your own cash to add to the pot. 6670 run about 75 dollars...the 7790 will be almost a hundred more when i launches. but maybe you could get enough for the 7770 ($110) with some extra chores or mowing neighbors yards.
My full PC budget is $600 not including speakers, monitors and keyboards. can ASRock 970 Extreme3 Motherboard support AMD fx 8350 cpu...??