Quake 4 framerate?

[Hawk]

Im running a Geforce 6800 ultra and the game runs great at high quality and 1280x1024 res. 4x aa. But if I go to ultra 800x600 and 1024x768 it runs fine until something happens like changing weapons, explosions etc. Does it take a 7 series card to handle the ultra textures in quake 4 or is my vid card jacked up. I can run Doom 3 no prob on ultra with everthing is quake 4 that much more stress on video card.
My system is
3.4 gig P4 Ht
1gig of pc-3200
GeForce 6800 Ultra
200gb Ide hd
Creative sound blaster X-Fi platinum
logitech 5.1 surround sound
Cd-Dvd burner
52x cd reader.

 

[mpjesse]

I believe there is a problem with either the game or the nVidia drivers. I have 2x 7800GTX's in SLi and I have the same exact problem you do.

I personally do not see a visible difference between high and ultra... so I just play it at high.

-mpjesse