not if the game use more than 256mb vram and less than 384mb. i don't care what your bandwidth is. when your out of vram your out of vram. and you get to enjoy 3fps gaming in all it's glory while a card with more vram and similar gpu power will be much higher lets say 30fps.
this card will be good if it is priced right. those specs, good ram (samsung hopefully) and a $100-120 price tag and it will dominate the low end to midrange section. it would be a perfect card for a budget machine that runs say 1024X768 or 1280x1024.