Uh, not well.
The Ti4600 was cutting edge in like 2001/early 2002. You're looking at a 3dmark 2001se score of around 10-14k, depending on the system it's in.
For comparison, the latest ATi cards do 17-21k+
And the Ti4600 is not DirectX 9 compatible, which newer cards are.
Also, keep in mind that nVidia cards have never had image quality that is as good as ATi's. This is the main reason why I've always used ATi cards, even when the ATi chips weren't quite as fast as the nVidia stuff- nVidia's crappy image quality didn't justify the extra speed.
Get a Radeon 9800XT, 9800 Pro, 9700 Pro, 9800, 9700, 9500 Pro, 9600XT, 9600 Pro, 9500, or 9600 (in order from fastest to slowest).
Just whatever you do, do NOT get a GeForce FX. The entire GeForce FX line is the single biggest f**k up in the history of the graphics card industry, and probably in the history of the entire computer industry.
None of the GeForce FX cards, including the top of the line 5950 cards, can run DX9 code at anything resembling acceptable frame rates, and the image quality is STILL subpar.
The GeForceFX 5200, which is the budget FX, is the most pathetic excuse for a graphics accelerator in recent history. The older GeForce 4MX cards are faster. Hell, the Radeon 7500m 64mb in my LAPTOP is faster than the FX5200, and by a pretty good margin too. ;D