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36 CrossFire
™
Rendering Modes
The first three are performance-oriented modes, while Super Anti-aliasing
is a quality-oriented mode. Each mode uses a different method for dividing
the workload required to render a 3D image across multiple GPUs. Only
one mode can be in operation at any given time.
The ATI Catalyst
™
display driver will automatically select the best of the
three performance modes when a 3D application is started, without
requiring user intervention. The user can also choose to improve image
quality by selecting the new Super Anti-aliasing modes in the Catalyst
™
Control Center.
SuperTiling
In this mode, each frame to be rendered is divided into a number of tiles in
an alternating checkerboard pattern, so that half of the tiles are assigned to
each of the two GPUs. Each tile is kept to a relatively small 32x32 pixel
square, so this method does a good job of balancing the workload across
each GPU regardless of what is being rendered on the display, doing so
without any software overhead.
1
PCI Express
®
CrossFire
™
Compatible Graphics Card
2
Radeon
®
X1950 XTX CrossFire
™
Edition Graphics Card