GeForce4 Ti4600	GeForce4 Ti4400	GeForce4 Ti4200
Core Size	0.15m	0.15m	0.15m
Core Speed	300 MHz Core	275 MHz Core	250 MHz Core
Memory Speed	650 MHz Mem	550 MHz Mem	500 MHz Mem
Memory Width	256 bit SDR (128 bit DDR)	256 bit SDR (128 bit DDR)	256 bit SDR (128 bit DDR)
Memory Size	128 MB	128 MB	128 MB
Memory Bandwidth	10.4 GB/s	8.8 GB/s	8 GB/s

As we can see from the above, those are the spec's as defined by nVidia for each of the GeForce 4 line of cards and the GS Ultra/750XP adheres to those defined above.

Unlike the transition from the GeForce 2 -> GeForce 3 which was a revolutionary step, the GeForce 4 is more of an evolutionary step. Based on GeForce 3 Technology, the GeForce 4 Ti's are built on 0.15m (micron) technology which allows the GeForce 4 to run up to 300 MHz core speed up from the 240 MHz the GeForce 3 Ti500 runs. The nFinite FX engine found in the GeForce 3 has been upgraded and the new nFinite FX II engine now has a second vertex shader which allows the GeForce 4 Ti too pump out more polygons then ever before. The rest of the nFinite FX II engine stays the same as the GeForce 3.

The Lightspeed Memory Architecture found in the GeForce 4 has also been upgraded as well, the new LMA II has a vastly improve Z-occlusion culling. Since most cards suffer from a great amount of overdraw (pixels are rendered in a scene even though they're not visible), nVidia tweaked the Z-occlusion. What this does is the GPU will sense what pixels will and will not be rendered and those parts that will not be rendered won't thus saving the bandwidth for other parts of the scene.

Also included in the LMA II architecture is nVidia's Quad Cache. They are the Vertex Cache, Primitive Cache, Texture Cache and Pixel Caches but unfortunately we don't know the size of the caches or how they have been tweaked for better performance from the GeForce 3.

nView:

One of the great things about the whole GeForce 4 line of cards (yes even the MX's) is nView. You remember nVidia's attempt at dual display called TwinView with the GeForce2 MX? Well nView is more then just dual display. The first thing that you will notice is that nVidia is taking direct aim at the dual display world, with dual 350 MHz RAMDAC's this ensures that a GeForce 4 videocard has sharp images even at 1600x1200. The GS Ultra/750XP is special in, it is the only GeForce 4 Ti that can support two DVI monitors at the same time. If you don't use DVI, not to worry the Gainward also has two DVI to analog converters. If you would like to use DVI and an analog based monitor that's also not a problem.

One of the neat options nView has is to allow translucency of programs. For those of us who like to watch TV or need to monitor another program nView makes that possible.