|"i said at $50 or less"|
Exactly. And if you looked at the cards I linked to, the 9600GSO is $35 after rebate w/$2 shipping. The HD4670 is $40 after rebate w/free shipping.
The cards you picked both suck for gaming. You obviously know very little about graphics cards. 64-bit memory? Better do some research or you'll be VERY disappointed.
Maybe this will help: