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Dual Graphics Comparison Table

The Dual Graphics Platform Battle, Part 1
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Feature ATI MVP Crossfire NVIDIA SLI
Motherboard Requirements ATI Radeon Xpress Crossfire Edition chipset or compatible (Intel 975X). NVIDIA SLI certified chipset. Currently nForce4 SLI family only.
Motherboard Availability Still limited. Plenty of models around.
Graphics Cards Requirement One MVP/Crossfire-compatible Master card and a second one that is at least equally good

Two equal SLI-compatible graphics cards

Dual Graphics Facts Best performing scenario uses MVP/Crossfire Master graphics cards. These come with an additional chip that composes the imaged rendered by the two graphics chips. SLI has some more overhead due to image composition that is done by the GPUs. In exchange, the GeForce 7 series top model is slightly faster today.
Dual Graphics Modes SuperTiling
Scissor
Alternate Frame Rendering
Super AA
Alternate Frame Rendering
Split Frame Rendering
Super AA
Graphics Card Interlink DVI-type interlink cable

SLI bridge connector

Graphics Card Flexibility Using ATI's 5.11 Catalyst driver (and up) eliminates the need for a Crossfire Master graphics card and allows running entry-level MVP setups without the interlink cable.
Highest end models still in short supply.
Using ForceWare driver versions 80 and up eliminates the need for identical graphics cards and allows running entry-level SLI setups without the SLI bridge connector.
Driver Requirements and Details ATI graphics driver with Crossfire/MVP mode enabled. Dual core CPU support to be added with release 5.12 NVIDIA graphics driver with SLI mode enabled. Dual core CPUs supported.
Price range for two entry level graphics cards $95 each (Radeon X1300) $90 each (GeForce 6600LE)
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