The NV40 non ultra, amateur version is going to be clocked lower but we don’t have any details how slower yet. The price will be around €/$299. Both boards will use similar memory configurations but we suspect that Nvidia might offer a 128 bit version of the card.Source: The Inquirer
Nvidia will use similar PCBs (printed circuit boards) for desktop and workstation cards as before.
Production of NV40/NV40 Ultra is scheduled for April.
NVIDIA NV40 and NV40 Ultra information

NVIDIA will launch two NV40s , a normal one and an Ultra version with a higher clocked core and higher clocked memory. The NV40 Ultra is expected to be released at a cost of about €/$499. The memory of the Ultra version will probably be clocked at 600MHz and it will be using GDDR3 memory.