I usually don't start topics, but I need some advice. An old friend of mine bought himself an 8800 GTX yesterday, and is now looking to get rid of his 7950GT 512MB card. He has had this card for four months, and is offering it to me for $100. Since I already have a 7900GS on my computer, is it worth paying $100 for a 7950GT? Please let me know if you think the upgrade is worth $100.