If you remember, and bear with us, dear reader, NV45 is NV40 with BR2 bridge so NV48 is bridge of the bridged card, it sure isn't a native. We could say or describe it as an update of an updated marchitecture. But we won't do that. Oops! We just did.
NV48 will keep the Geforce 6800 series name and if we talk about the NV48 Ultra we will end up with 6800 Ultra 512 MB card. Gainward already announced such a card and it hopes to demo it at the soon to be upcoming CeBIT, or hangover as my dad says.
We are easily sailing towards the new memory graphic wars. Do we actually need 512MB of memory? You don't want me to answer that question. So all I will say is, give the piece a chance. ยต