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CrossFire
™
Overview 105
Alternate Frame Rendering (AFR) Mode
In this mode, all even frames are rendered on one GPU, while all odd
frames are rendered on the other. The completed frames from both GPUs
are sent to the Compositing Engine on the CrossFire
™
Edition card, which
then sends them on to the display. By allowing both GPUs to work
independently, AFR provides the greatest potential performance
improvements of all the available modes. It is also the only mode that
allows the full vertex processing performance of both GPUs to be
combined.
The main limitation of this mode is that it cannot be used in applications
where the appearance of the current frame is dependent upon data
generated in previous frames, since AFR generates successive frames
simultaneously on different GPUs. In these cases, the SuperTiling or
Scissor Mode is used instead.
1
PCI Express
®
CrossFire
™
Compatible Graphics Card
2
Radeon
®
X1650 PRO CrossFire
™
Edition Graphics Card
3
Partial Frame Rendered on PCI Express
®
CrossFire
™
Compatible
Graphics Card
4
Partial Frame Rendered on PCI Express
®
CrossFire
™
Edition
Graphics Card
5 Final Rendered Frame on Display