Can I use either of these with my system without upgrading my PSU? And are there any better options if any at all? And is there that much of a difference between the 2 I suggest, 6670 and 7750, to be worth the extra $40.
I'm not a serious PC gamer, I just want to be able to play Diablo smoothly with my friends, with reasonably good to really good graphics without frying my computer or spending all my money.
All helpful suggestions, advice and comments appreciated. If any more info is needed just ask, thanks!