why?

[xNIKx]

why would a 512mb x1950xtx be able to support high ends games at max settings and the 512mb 7950GT would not?
http://www.newegg.com/Product/Product.asp?Item=N82E16824116381

 

[happy medium]

Because the memory and core are clocked higher and are more efficient per clock.

 

[hmorphone]

Because the power of a video card is not determined by the amount of memory it has?