7800 GS CO Superclock (EGVA fan N509) 1.6ns memory , CineFX 4.0 engine, Intellisample 4.0
78800 GS CO Superclock (reference fan N508)
7800 GS CO (Evga fan N506) 1.6ns memory, CineFX 3.0 engine, Intellisample 3.0
7800 GS (Reference fan N505) 1.4ns memory, CineFX 4.0 engine, Intellisample 4.0
Is the 1.4ns memory better? I am hearing the lower this number the better overclockign potential it has? If so why is the Superclock card at 1.6ns memory? And why would the (N505) with the 1.4ns memory be the cheapest card?
Also, what is the difference between the 3.0 and 4.0 versions of the CineFX and Intelisample?
Which cards have the better copper heatsink?
Which card is the overall best if i want to overclock it myself for the fastest speed?