Probably to show they are not worse than 3dfx, NVIDIA has built in a secret key into the Detonator 5 that enables
the full-scene antialiasing (FSAA). Here is what you need to insert into you registry: 
 
To enable:
[HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Class\Display\0000\NVIDIA\OpenGL]
"EnableFSAA"=dword:00000001
 
To disable:
[HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Class\Display\0000\NVIDIA\OpenGL]
"EnableFSAA"=dword:00000000 
 
It may happen that the currently installed driver's settings reside in a section other than '0000'. It can be
'0001', '0002', or something else of that kind. You will easily find the right section, I believe. 
 
The full-scene antialiasing works only under the OpenGL but doesn't require a game (or application) to support that
feature. You can see thr benchmarking results in the table below: 
 
Quake3 Demo001, GeForce 256 SDR, Athlon 650 
 
Resolution   w/o FSAA  w/FSAA 
 
800x600x16     94,1     30,7 
800x600x32     68,0     19,3 
1024x768x16    67,6     19,1 
1024x768x32    68,0     11,3