Appendix B: CrossFire™ FAQ
95
6. What happens when your CrossFire Edition card and and a
compatible standard Radeon (CrossFire Ready) graphics card
have different clock speeds?
Both cards will continue to operate at their individual clock speeds.
7. What is the difference between a CrossFire™ Edition graphics
card and a standard graphics card from the same family?
CrossFire™ Edition graphics cards include a “compositing engine,” a
chip that takes the partially rendered image from the Slave graphics
card and merges it with the partially rendered image from the Master
graphics card. The result is a complete frame rendered at up to twice
the performance of a single graphics card.
8. How are the graphics cards connected on a CrossFire™ system?
The two cards are connection by an external cable. The cable is
attached from the Slave graphics card’s DVI-I connection to the
CrossFire™ Edition’s VHDCI connection, which is used to convey
information from the Slave graphics card to the Master graphics card
and transmit the combined signal to a display device.
9. Which games/applications work with CrossFire™?
CrossFire™ works with all 3D games and applications. If Catalyst®
A.I. is enabled in the Catalyst® Control Center software, the optimal
rendering mode available for the application is automatically selected.
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