Intel D845GEBV2 - OCTOBRE 2002 Manual page 32

Intel Desktop Board D845GEBV2/D845GERG2 Technical Product Specification
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Increased headroom for larger resolution and color depth
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Reduced power as a result of decreased memory bandwidth
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Reduction in depth and color bandwidth associated with conventional rendering
For information about
Obtaining the Zone Rendering white paper
1.8.1.4 AGP Connector
The AGP connector supports either:
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1x, 2x, or 4x AGP add-in cards with 1.5 V I/O
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AGP Digital Display (ADD) cards
For information about
Obtaining the Accelerated Graphics Port Interface Specification
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INTEGRATOR'S NOTES
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Install memory in the DIMM sockets prior to installing the AGP video card to avoid
interference with the memory retention mechanism.
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The AGP connector is keyed for 1.5 V AGP cards only. Do not attempt to install a legacy
3.3 V AGP card. The AGP connector is not mechanically compatible with legacy 3.3 V
AGP cards.
1.8.1.5 AGP Digital Display (ADD) Card Support
The GMCH routes two 12-bit multiplexed DVO ports that are each capable of driving a 165 MHz
pixel clock to the AGP connector. The DVO ports can be paired for dual channel mode. In dual
channel mode, the GMCH is capable of driving a 24-bit 330 MHz pixel clock. When an AGP add-
in card is used, the Intel Extreme Graphics controller is disabled and the AGP connector operates
in AGP mode. When an ADD card is detected, the Intel Extreme Graphics controller is enabled
and the AGP connector is configured for DVO mode. DVO mode enables the DVO ports to be
accessed by an ADD card. ADD cards can support up to two display devices with the following
configurations:
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TV-Out
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Transition Minimized Differential Signaling (TMDS)
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Low Voltage Differential Signaling (LVDS)
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Single device operating in dual channel mode
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INTEGRATOR'S NOTES
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Synchronous display is not supported when one of the display devices is a TV.
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Digital Visual Interface (DVI) support is present only when an ADD card is installed.
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Refer to
http://developer.intel.com/design/chipsets/845g/
Refer to
Section 1.5, page 20