nVidia 'NV35'
This chip is used for GeForce FX 5900 ZT, 5900 XT, 5900, 5900 Ultra and PCX 5900.
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This card looks like a Leadtek GeForce FX 5900 XT (WinFast A350XT TDH) but it's missing the fanguard/screen on top of the cooler. However, upon closer inspection I noticed it has a) a 5900 GPU and b) the PCB-layout a (Leadtek) GeForce FX 5900.
I guess either someone replaced the GeForce FX 5900 cooler with an 5900 XT cooler or the card didn't make it to the regular retail channel and didn't get the special Leadtek cooling.
Since I haven't tested the card I can't really what it is exactly. I'm still putting my bet at a 5900 with 5900 clocks 
. > Read more
To get a better position in the market, nVidia launched the GeForce FX 5900XT GPU. This graphics processor was one of the slower parts for the high-end market. Leadtek build their WinFast A350XT using the 5900XT GPU. As the 5900XT is fitted on a high-end (but somewhat cut-down) PCB with high-end memory it has lot's of potential for overclocking. Back in 2003 many enthusiasts bought the 5900XT-cards and overclocked it to get good performance. > Read more
Very notable is the cooling design which seems and feels quite good. In reality it's not much high-tech as it's practically a box around the card with air flowing through. Nevertheless it looks good.
Leadtek's WinFast A350 TDH LX is based on the nVidia GeForce FX 5900 GPU. The 'LX' means it has lower clocked memory to reduce the price. Regular 5900's are fitted with 2.2NS RAM modules whereas this Leadtek uses slower 2.8NS memory. When the card was new it was sold for about 100$ less than regular 5900's.
Unfortunately my card doesn't work so I can't get any benchmarks. > Read more