User`s guide

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CrossFire™
CrossFire™ is a multi-GPU performance gaming platform, using
CrossFire™-ready motherboards and CrossFire™-compatible graphics
cards.
CrossFire™ works with all 3D games and applications. If ATI Catalyst™
A.I. is enabled in the ATI Catalyst™ Control Center software, the optimal
rendering mode available for the application is automatically selected.
Performance enhancements experienced on a CrossFire™ system depend
on the application or game being used. Performance improvement of up to
100% have been recorded. The latest graphics-intensive programs will
generally see over 80% performance improvement at high resolutions and
high image-quality modes.
CrossFire™ Requirements
The basic requirements of an ATI Radeon™ HD 2900 Series CrossFire™
system are:
• Two ATI Radeon™ HD 2900 Series CrossFire™ graphics cards
• Two internal CrossFire™ bridge interconnects
• A CrossFire™-ready motherboard
• A 750-watt power supply or better with two 2×3-pin and two
2×4-pin PCIe™ power connectors.
For an up-to-date listing of CrossFire™ certified motherboards, see
ati.amd.com/products/certification
For an up-to-date listing of certified power supplies, see:
ati.amd.com/CertifiedPSU
Install CrossFire™ Graphics Cards
The following set of instructions assumes that one ATI Radeon™ HD 2900
Series graphics card has already been successfully installed in the primary
slot (slot zero), and that the secondary slot (slot one) is empty.