Left 4 Dead: System requirements
The system requirements are appropriate for the Source Engine Valve used for Left 4 Dead. The most important component is a (very) fast processor and you should have a middle-class graphics card, too.

Minimal:
- Operating system: Microsoft Windows XP / Vista / Vista64
- Processor: Pentium 4 3.0 GHz
- Memory: 1 GB
- Graphics: 128 MB, Shader model 2.0, Ati 9600, Nvidia 6600 or better
- Hard drive: At least 7.5 GB of free space
- Sound: DirectX 9.0c compatible sound card

Recommended:
- Operating system: Microsoft Windows XP / Vista / Vista64
- Processor: Intel Core 2 Duo 2.4 GHz
- Memory: 1 GB
- Graphics: Shader Model 3.0, Nvidia 7600, Ati X1600 or better

Left 4 Dead: Graphics options
The graphics options can be found in the "Video” menu. Among the options available there are the following, important examples:

- Resolution
- Film Graining Amount
- Shader Details (reflections, lighting)
- Effect Detail (shadows, geometry)
- Model/Texture Detail (texture resolution, geometry)
- Page Pool Memory Available (video memory usage)

All screenshots were taken at 2,560 x 1,600 on a Geforce 9800 GTX On the next pages you can find the appropriate comparisons.