Doom3 Dust + Fog = Major Slowdown

[ASH1982]

Hi,

I saw a thread similar to this where any smoke or dust on-screen causes the game to crawl right down.

I don't have trouble with any other games, just Doom3.

Latest Nvidia drivers, game patched.

My bro who has an GTS gets roughly 54FPS on the timedemo (16xAA and 16xAF). For me, with a GTX OC and a C2D, I get 31FPS!

So something is defo not working correct. Anybody with anything similar in this game can help me out please?

Cheers guys!

 

[Sir Random]

Are you both using the same drivers?

Make sure v-sync is turned off in the drivers, when running the time demo.

 

[ASH1982]

yes same drivers
also wouldnt vsync slow the entire game down... not just when there are fog/steam effects which is what is happening

 

[XtAsY]

yes same drivers
also wouldnt vsync slow the entire game down... not just when there are fog/steam effects which is what is happening

vsync enabled will not allow the frame rate to exceed the refresh rate of your monitor, so it should not be related to volumetric effects such as smoke and fog. I have noticed a similar issue in a couple of areas in Half Life 2 Episode 1 when flickering lights are used in abundance along with smoke. The frame rate slowed to a crawl (and no it wasn't the illusion of strobe lighting)

Do you have a sound card installed? What PCI slot is it in if you do?

Do you encounter this problem in any other game would be the the primary question.

 

[ASH1982]

Cheers,

Strange like. Yeah we both have X-Fi soundcards and both are in the bottom most PCI-E slot. I haven't noticed the problem in any other game....