15fps?!
That is low for AH but I don't run at 1280x1024x32. I am running AH at 1024x768x32 and get no less than 50fps even when there are planes all around and things blowing up and smoking.
Here is my setup:
AMD Athlon T-Bird 1.4GHz, 512MB PC2100 DDR, ASUS A7V266, Abit Siluro GF4 Ti4400, Diamond MX300, 3Com 905B TX 10/100, TEAC 24x10x40 CDRW, (MIA suspected Dead) Pioneer Slot load 32X CD-ROM, ADSL connection, WinXP Pro, DX8.1
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BTW here is my 3DMark2001SE score and setup:
SETUP
Operating System Microsoft Windows XP
DirectX Version 8.1
Mobo Manufacturer ASUSTeK Computer INC.
Mobo Model A7V266
AGP Rates (Current/Available) 4x / 1x 2x 4x
CPU AMD Athlon(tm) Processor 1410 MHz
FSB 133 MHz
Memory 512 MB
Graphics Chipset NVIDIA GeForce4 Ti 4400
Driver Name NVIDIA GeForce4 Ti 4400
Driver Version 6.13.10.2832
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
SCORE
3DMark Score 7150 3D marks
Game 1 Car Chase - Low Detail 112.7 FPS
Game 1 Car Chase - High Detail 39.0 FPS
Game 2 Dragothic - Low Detail 118.1 FPS
Game 2 Dragothic - High Detail 75.7 FPS
Game 3 Lobby - Low Detail 98.2 FPS
Game 3 Lobby - High Detail 46.0 FPS
Game 4 Nature 32.3 FPS
Fill Rate (Single-Texturing) 571.8 MTexels/s
Fill Rate (Multi-Texturing) 1446.1 MTexels/s
High Polygon Count (1 light) 37.2 MTriangels/s
High Polygon Count (8 lights) 11.1 MTriangels/s
Environment Bump Mapping 117.2 FPS
DOT3 Bump Mapping 87.0 FPS
Vertex Shader 73.7 FPS
Pixel Shader 94.4 FPS
Advanced Pixel Shader 66.0 FPS
Point Sprite 18.5 MSprites/s
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It could be better but I am happy with it and I don't have slow choppy video in games.