9800 GX2 clearly wins over 3870 X2
We said this back in 2007 but let us be clear on one thing. Nvidia’s upcoming high end sandwich board, Geforce 9800 GX2 is going to end up faster than a single Radeon 3870 GX2.

This comes as no surprise as Nvidia’s single G92 is faster than a single RV670 and in the same matter a dual chip Nvidia beats ATI.

Radeon 3870 X2 will be very competition as its single chip brother was but it is still a bit slower compared to Nvidia. We still believe hat Radeon 3870 X2 will have quite good sales as it will be significantly cooler than Nvidia’s card and it will be available in massive numbers.
Fudzilla

GT200 won't do DirectX 10.1
In this early stage, we've learned that even in the next generation Nvidia doesn’t plan to support DirectX 10.1 API.

Nvidia wants to continue its DirectX 10 path and there's a good chance that it will simply migrate to DirectX 11 before it supports DirectX 10.1.

As Nvidia has a dominant position in game development and publishing community it doesn’t look that DirectX 10.1 has a lot of chances in 2008, but ATI will certainly push a title or a few that will have full support for DirectX 10.1.
Fudzilla