hey all I am building a budget gaming/work pc built around a phenom II 970. It looks like the 6670 card is the best card I can get for the money situation at the moment. I have found cards similarly priced but one has more memory with GDDR3 but the other has less memory with GDDR5. which will preform better? Also, if neither of these cards are really worth the money let me know. I could possibly grab a 650 for $100, but I would rather not if I dont have to.