DirectX

SDK 10
SDK 9

Popular Samples
Transparency AA
SLI Best Practices
Post-Processing with AA
GPU Cloth

Misc
GPU Device IDs

External Links
DirectX Homepage

Performance
PerfKit
PerfHUD
PerfSDK

ShaderPerf

Practical Perf. Analysis

Shader Authoring
FX Composer

All Recent Documents

DirectX 10
Coverage Sampling Antialiasing (CSAA)

Next Generation Effects in DirectX10

DX10 Performance and usage considerations

DirectX 9
Optimization for DirectX 9 Graphics

Shadowing Strategies for HLSL and FX Composer

Recent Developer Presentations

Game Developer Conference 2007 (San Francisco)
NVIDIA FX Composer 2: A Comprehensive Shader Development Package
GPU Optimization with the Latest NVIDIA Performance Tools
Real-time volumetric smoke using D3D10
Soft shadows using hierarchical min-max shadow maps
How to make use of Direct3D10 now

CEDEC 2006 (Tokyo)
State of the Art Cross-Platform Shader Development with FX
Introduction to DX10
DX10 Performance and usage considerations
Physics Simulation on NVIDIA GPUs

SIGGRAPH 2006
State of the Art Cross Platform Shader Development
Next Generation Effects in DirectX10
Optimize Your GPU with the Latest NVIDIA Performance Tools

Develop 2006
Next Generation Games with Direct3D10

Game Developers Conference 2006 (GDC)
DX10: Prepping your Engine for a Smooth Start
DX10: Batching and Performance Considerations
DX10: Practical Metaballs and Implicit surfaces

For older events, check the events calendar.