ATI Technologies X1950 PRO manual On what basis are different rendering modes chosen?

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•Alternate Frame Rendering - the two graphics cards are used to render alternate frames of the display. This configuration increases the detail of the 3D objects each card can render, as each card handles half of the total number of frames.

The features above are performance features settings automatically selected by ATI's Catalyst™ Control Center.

You can instead enable Super Anti-aliasing, which is a display quality mode selectable using Catalyst™ Control Center.

•Super Anti-aliasing- improves image quality by combining the results of full-screen anti-aliasing across two graphics cards in a CrossFire™ configuration. The two graphics cards work on different anti-aliasing patterns within each frame.

9What happens if you pair two CrossFire™ graphics cards with different architectures?

In order for CrossFire™ to work, the Radeon® X1950 Pro graphics card must be paired with another Radeon® X1950 Pro graphics card.

10On what basis are different rendering modes chosen?

When Catalyst™ A.I. is enabled in Catalyst™ Control Center, it determines the optimal rendering mode to use, based on the application or game being used. The default rendering mode is dependant on both the hardware configuration and the application being run; typically it will be either Scissor or SuperTiling mode. If Catalyst™ A.I. is not enabled, any Direct 3D® applications that are running on a system based on graphics cards with 16-pipeline graphics processors will use SuperTiling Mode.

11What type of performance improvement is expected?

Performance enhancements experienced on a CrossFire™ system depend on the application or game being used. Performance improvements can be increased up to 100%, and the latest graphics-intensive programs will generally see over 80% performance improvement at high resolutions and image-quality modes.