The NV28 is just an NV25 with AGP 8X and some clock speed increase. What's an NV25? Well it's some sort of graphics chip without AGP 8X. What's AGP 8X? It's a nice little arrangement of letters and numbers that may make you choose to buy one graphics card over another when you see it written on the box. OK?The Gainwards will use a 8 layer design and will give the ability to clock it up to 40% faster!
Gainward is about to ship NV28-based cards that will feature 128MB of DDR Ram, but at press time we are not able to tell you what will be the clock speed used on these cards. The name on the card, however, will be GeForce4 PowerPack! Model Ultra/750-8X XP "Golden Sample" and you will be able to get one of the hand-selected cards from Gainward's production line for "just" 399 Euros.
Source : TheInquirer