The memory type slipped my eye... oops
However, it won't make such a difference in performance in lower resolutions if it's 1gig or 1.5gigs, right?
The difference in memory 1gig and 1.5 will not have anything to do with performance. It is the clocks that spell preformance. The memory comes into play when you are trying to run more than one monitor.
It also plays in resolution if is is above 1920 x 1200. So at low resolution it will not hurt anything. The only thing that the GT 440 has going for it is the rendering and AA. The ddr3 or ddr5 won't affect anything.
All other accounts point out the 6670 is better than the GT 440.