My solution for DoOm 3 slowdowns - try it! (nvidia only?)

HappyFunBall

Junior Member
Aug 4, 2004
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Howdy. I was getting nasty drops in framerates any time there were "distortion effects" in a scene. This occurs where fire is used in the game, and when you are looking through curved glass, etc. I'm talking about 30-40 fps down to 5 or less. No exaggeration.

Here's what solved it for me:

I was grabbing at straws, until I did this:

I went into my display settings->advanced->geforce->performance and quality settings->Show advanced settings- then scrolled down and turned Anisotropic Optimization ON. All my slowdowns are gone!!!! This couldn't be easier to try.

I'm currently playing at 1024x768 (can go higher too), highest quality setting, 2x AA, no vsync.
I can post timedemo scores if anyone is curious.

I was even able to play at 1600x1200, and even with the Ultimate quality settings - it was playable, but slower of course. My system:

Geforce 5900, 128 mb/non-ultra version - tried standard clock and also at 470/950 (stable!)
AMD XP 2500+ o/c'd to 2268? mhz - I've been higher as well.
1 gig, 512 each stick, dual channel ram - DDR2700 or higher, I forget
190 mhz bus speed (dual channel set in bios - using 'uber' bios)
Asus A7N8X motherboard
Latest nforce 2 drivers
Latest nvidia vid card drivers

Now if I could only solve my 5.1 sound issues with my Lansing 251's. Cheap, but not horrible speakers.

Oh yeah, I also made this change in the doom config file (but this didn't solve the massive slowdown problem, but game me a decent boost in overall fps)

Orig:
seta image_cacheMegs "20"

New:
seta image_cacheMegs "256"

I'd try setting it to 128, and seeing how you do. More ram helps, so I've read. This cfg file tweak has helped some, but not others.

Never saw any posts concerding the anisotropic optimization tweak. I got really lucky there.

Happy dooming. For shits and giggles, I maxed everything. 16x AA, 1600x1200, ultimate (or is it ultra?) video quality... It was actually playable, but slow. It looked SWEET. I wish I had a faster video card. Not willing to plunk down $400 for it...