Strange FPS problems

I have a nVidia 6800GT with 256MB of on card Ram. I have an AMD Athlon 64 3200+ and i have 1GB of Motherboard RAM. I have the latest drivers for all my hardware.

Whenevr i run any game on my machine, everything works fine at maxed settings. Halo PC and even Far Cry ran smoothly and cleanly. All games, except Guild Wars. I have my setting maxed out (Anti-Aliasing 4x, etc.), and the FPS hovers around 15, and occasionally spikes to 38 for a few seconds. It also spikes down to 5 every once in a while. When i drop the settings to as low as it can go, the FPS does exactly teh same thing. it stays at around 15 the whole time. NOtheing else glitches. None of teh reflections or shadows are messed up.

Does anybody have any insight into what may be causing this? Thanks in advance.

Try turning all sound off in game.

I have the same problem and turning the sound off raised the frames to over 40 per second. Others have said it might be the sound driver in the game.

Thanks fo rteh tip. I tried it, but no change in performanve happened.

nVidia 6800?? -- Turn off Post Process Effects

just one more reason I dont like nVidia

(P.S. GW Was designed for ATI, so the stability will be greater on ATI cards... read the logo on the factions box )

I run GW on a P4-1.8 + 6800GT, P4-2.5 + 6800Ultra, and Dell XPS M1710 w/ 7900GTX-512. The 1st box pretty much requires lowest settings to remain playable. The 2nd and 3rd can run all effects maxed out with frame rates in the 30-60fps range.

I run GW on a AMD 64 3500+, ASUS A8V deluxe mobo, 1 gb hyperx ram, ATI X800XT Platinum and a Sound blaster Audigy 2 ZS with all settings at max and it runs at about 40-60 FPS the lowest i have seen it is 36 fps the highest has been 85 fps everything works good for me

Thanks for the tip, but i have already tried dropping very setting to the lowest they can go (including unchecking vsync and p-process) and to no avail.

I'm just gonna reinstall GW. Also i read about these things called the Omega Drivers. Do they work?