Leadtek WinFast A350 TDH LX
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 .