Nvidia will price those cards at around $299 or just a little bit higher in Europe. This means that Nvidia will sell a card clocked at minimally 450 MHz core or even higher, a 256 MB card with full 24 pipelines for a price of 7800 GT. The performance of 7900 GT might be as high as 7800 GTX as the card is clocked 10 MHz higher and has the same number of pipelines. It will have 256 MB of memory but no one should care that much about RAM as 512 MB card is rarely faster than the same clocked 256 MB card. Still we know it sounds cool to say you have 512 MB card.
We expect that the cards will be very overclockable as they are 90 nanometre based and there is still enough space to set the clocks even higher. We know a few companies that plan to clock those cards a little bit higher from the launch date.
ATI will have to respond with a X1900 XL 256 MB card and will have to sell it for the same money that Nvidia wants for 7900 GT. It has to convince the people to stay off the 7900 GT. ยต