I didn't think the 6800U and X800XT could run as 8x2 parts -- I thought they only ran at 16x1 (or 32x0 for NVIDIA when doing Z-only operations). I could be wrong, though. Not like there's a huge difference between 8x2 and 16x1, anyway...
Also, you REALLY need to make that list of cards more readable, and give more information in there
Card Name.........................Core....Mem.......Bus.....Pipelines.........RAM..........SM.......
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GeForce FX 5950 U...............475......950.....256-bit........8*.............256...........2.0.......
GeForce FX 5900 U...............450......850.....256-bit........8*.............256...........2.0.......
GeForce FX 5900...................400......850.....256-bit........8*.............128...........2.0.......
GeForce FX 5900 XT.............300......700.....256-bit........8*.............128...........2.0........
GeForce FX 5800 U...............500.....1000....128-bit........8*.............256...........2.0........
GeForce FX 5800...................400......800.....128-bit........8*.............128...........2.0........
GeForce FX 5700 U...............475......900.....128-bit........4............128/256.......2.0........
GeForce FX 5700...................425......550.....128-bit........4............128/256.......2.0........
GeForce FX 5600 U Rev 2....400......800.....128-bit........4...............128..........2.0........
GeForce FX 5600 U...............350......700.....128-bit........4...............128..........2.0........
GeForce FX 5600...................325......550.....128-bit........4................128..........2.0.......
GeForce FX 5200 U...............325......650.....128-bit........4............128/256........2.0**....
GeForce FX 5200...................250......400.....128-bit........4............128/256........2.0**....
GeForce FX 5200...................250......400.......64-bit***...4............128/256........2.0**....
GeForce4 Ti 4600-8x............300.......650....128-bit.........4............128..............1.4....... (AKA GeForce4 Ti 4800)
GeForce4 Ti 4600.................300......650.....128-bit.........4............128...............1.4.......
GeForce4 Ti 4400.................275......550.....128-bit.........4............128...............1.4.......
GeForce4 Ti 4200-8x............250......514......128-bit........4...........64/128............1.4......
GeForce4 Ti 4200 128..........250......444.....128-bit.........4............128...............1.4......
GeForce4 Ti 4200 64............250......514......128-bit.........4............64.................1.4......
GeForce4 MX 460..................300........?........128-bit.........4****....32/64..........DX8*****
GeForce4 MX 440-8x.............275......512......128-bit.........4****....32/64..........DX8***** (AKA GeForce4 4000)
GeForce4 MX 440..................270......400......128-bit.........4****....32/64...........DX8*****
Radeon 9800 XT..................412.......730......256-bit..........8.........256..............2.0......
Radeon 9800 Pro256..........380.......700......256-bit..........8.........256..............2.0......
Radeon 9800 Pro.................380.......680......256-bit..........8.........128..............2.0.......
Radeon 9800........................325.......580......256-bit..........8.........128..............2.0.......
Radeon 9800 Pro 128-bit...380?......680?....128-bit.........8.........128..............2.0.......******
Radeon 9800 SE..................380.......675......256-bit..........4.........128..............2.0.......*******
Radeon 9800 SE..................380.......675......128-bit..........4.........128..............2.0.......
Radeon 9700 Pro................325.......620......256-bit..........8.........128..............2.0.......
Radeon 9700.......................275.......540......256-bit..........8.........128..............2.0.......
Radeon 9600 XT..................500.......600......128-bit..........4.........128..............2.0........
Radeon 9600 Pro................400.......600......128-bit..........4.........128..............2.0........
Radeon 9600.......................325.......400......128-bit..........4......128/256...........2.0........
Radeon 9600 SE..................325.......365.......64-bit...........4......128/256...........2.0........********
Radeon 9500 Pro................275.......540......128-bit..........4........128................2.0........
Radeon 9500 128................275.......540......128-bit..........4........128................2.0.......
Radeon 9200.......................?............?.........128-bit.........4........64/128...........1.4........
Radeon 9000.......................?............?.........128-bit.........4.........64/128..........1.4........
Radeon 9100.......................?...........?..........128-bit........4.........64/128...........1.4....... (AKA Radeon 8500LE)
*: as noted above, these cards (those based on the NV35 and NV38 architectures) operate in a "4x2" mode when multitexturing. When single-texturing, or doing pixel shader operations, they behave as if they only have 4 pipelines.
**: while, technically, the GeForceFX5200 chipset supports DirectX9/Shader Model 2.0, these cards are far too slow to make effective use of it.
***: This card is EXTREMELY slow and should be avoided at all costs. It is barely faster than a GeForce2 MX400.
****: I believe the GeForce4MX cards can only run in 2x2 and 2x1 modes, and cannot run as 4x1 like the Geforce4Ti cards can.
*****: Note that, although they are marketed as "GeForce4" GPUs, the GeForce4 "MX" line is really a repackaged and slightly faster variant of the GeForce2. While it marginally supports DirectX8.1, it cannot do ANY pixel or vertex shader operations.
******: Sapphire was marketing these cards for a while, but I believe they have since stopped. They run much slower than a real 9800Pro.
*******: These cards use the same chipset as the 9800/9800Pro, with half of the pipelines disabled. *Some* of them can be "softmodded" into a RADEON 9800. At stock, they perform much like a RADEON 9600Pro. A few companies also sold 9800SEs with only a 128-bit memory interface; these CANNOT be softmodded and perform very poorly.
********: This card also performs EXTREMELY poorly.