Intresting I couldn't find anything even with a google search. Not in english anyway.
I wonder why your card wouldn't handle the nature demo? Granted it's the toughest one on your system.
Obviously I can't really compare your system & mine but if it helps you here it is.
System Configuration
Operating System Microsoft Windows XP
DirectX Version 8.1
Mobo Manufacturer MSI
Mobo Model MS-6380E
AGP Rates (Current/Available) 4x / 1x 2x 4x
CPU AMD Athlon(tm) XP/MP/4 1250 MHz
FSB 100 MHz
Memory 1024 MB
Graphics Chipset NVIDIA GeForce4 Ti 4400
Driver Name NVIDIA GeForce4 Ti 4400
Driver Version 6.13.10.2742
Video Memory 128 MB
Program Version 3DMark2001 SE
Resolution 1024x768 32bit
Texture Format Compressed
FSAA Disabled
Z-Buffer Depth 24bit
Frame Buffer Double
Rendering Pipeline D3D Pure Hardware T&L
Test Results
3DMark Score 7537 3D marks
Game 1 Car Chase - Low Detail 104.0 FPS
Game 1 Car Chase - High Detail 35.3 FPS
Game 2 Dragothic - Low Detail 149.1 FPS
Game 2 Dragothic - High Detail 83.5 FPS
Game 3 Lobby - Low Detail 97.6 FPS
Game 3 Lobby - High Detail 44.1 FPS
Game 4 Nature 38.6 FPS
I'm going to have to chalk up your problems just to some system specs. That shouldn't effect the older games though. From Max Payne on though it gets pretty hardware intensive.
"AGP Rates (Current/Available) 2x / 1x 2x "
Big bottleneck there. I believe thats due to your mobo not your video card.
Celeron 1002 MHz : I don't believe that any of the celerons have L1 or L2 cache. How much of a difference this would make I don't know.
I would assume if you begin to use up the 32 megs of ram on your video card it begins to use your cpu resources. Thats part of the idea of todays bigger badder vid cards, to give dedicated resources to doing just that.
I don't know what size monitor your using but maybe you'll get better performance or at least better frame rates at a lower resolution.
When you look at just my cpu compared to yours there's only a 25% difference in clock speed. Due to the difference in cpu architecture, mobo, video card & my overkill on ddr ram it looks a hell of a lot different. Trust me I feel bad when I read benchmarks for the latest & greatest Falcon Northwest screamer. Heaven knows I wish I had the cash to burn on a P4 system with all the bells & whistles.
Here's the only thing I could find comparing vidio cards.
Sorry it's such a large image.