Intel Desktop Board D915GEV BOXD915GEV Manual De Usuario
Los códigos de productos
BOXD915GEV
Intel Desktop Board D915GEV/D915GRF Technical Product Specification
24
• Video
Asynchronous dual monitor display with ADD2 card
Hardware motion compensation for software MPEG2 decode
Two multiplexed DVO port interfaces with 200 MHz pixel clocks using an ADD2 card
• Dynamic Video Memory Technology (DVMT) support up to 224 MB
• Intel
• Intel
®
Zoom Utility
For information about
Refer to
DVMT
Section 1.6.1.2, page 24
Obtaining graphics software and utilities
Section 1.3, page 17
1.6.1.2
Dynamic Video Memory Technology (DVMT)
DVMT enables enhanced graphics and memory performance through Direct AGP, and highly
efficient memory utilization. DVMT ensures the most efficient use of available system memory
for maximum 2-D/3-D graphics performance. Up to 224 MB of system memory can be allocated
to DVMT on systems that have 512 MB or more of total system memory installed. Up to 128 MB
can be allocated to DVMT on systems that have 256 MB but less than 512 MB of total installed
system memory. Up to 64 MB can be allocated to DVMT when less than 256 MB of system
memory is installed. DVMT returns system memory back to the operating system when the
additional system memory is no longer required by the graphics subsystem.
efficient memory utilization. DVMT ensures the most efficient use of available system memory
for maximum 2-D/3-D graphics performance. Up to 224 MB of system memory can be allocated
to DVMT on systems that have 512 MB or more of total system memory installed. Up to 128 MB
can be allocated to DVMT on systems that have 256 MB but less than 512 MB of total installed
system memory. Up to 64 MB can be allocated to DVMT when less than 256 MB of system
memory is installed. DVMT returns system memory back to the operating system when the
additional system memory is no longer required by the graphics subsystem.
DVMT will always use a minimal fixed portion of system physical memory (as set in the BIOS
Setup program) for compatibility with legacy applications. An example of this would be when
using VGA graphics under DOS. Once loaded, the operating system and graphics drivers allocate
additional system memory to the graphics buffer as needed for performing graphics functions.
Setup program) for compatibility with legacy applications. An example of this would be when
using VGA graphics under DOS. Once loaded, the operating system and graphics drivers allocate
additional system memory to the graphics buffer as needed for performing graphics functions.
NOTE
The use of DVMT requires operating system driver support.
1.6.1.3
Advanced Digital Display 2 (ADD2) Card Support
The GMCH routes two multiplexed DVO ports that are each capable of driving up to a 200 MHz
pixel clock to the PCI Express x16 connector. The DVO ports can be paired for a dual channel
configuration to support up to a 400 MHz pixel clock. When an ADD2 card is detected, the Intel
GMA900 graphics controller is enabled and the PCI Express x16 connector is configured for DVO
mode. DVO mode enables the DVO ports to be accessed by the ADD2 card. An ADD2 card can
either be configured to support simultaneous display with the primary VGA display or can be
configured to support dual independent display as an extended desktop configuration with different
color depths and resolutions. ADD2 cards can be designed to support the following
configurations:
• TV-Out (composite video)
• Transition Minimized Differential Signaling (TMDS) for DVI 1.0
• Low Voltage Differential Signaling (LVDS)
• Single device operating in dual channel mode
• VGA output
• HDTV output
pixel clock to the PCI Express x16 connector. The DVO ports can be paired for a dual channel
configuration to support up to a 400 MHz pixel clock. When an ADD2 card is detected, the Intel
GMA900 graphics controller is enabled and the PCI Express x16 connector is configured for DVO
mode. DVO mode enables the DVO ports to be accessed by the ADD2 card. An ADD2 card can
either be configured to support simultaneous display with the primary VGA display or can be
configured to support dual independent display as an extended desktop configuration with different
color depths and resolutions. ADD2 cards can be designed to support the following
configurations:
• TV-Out (composite video)
• Transition Minimized Differential Signaling (TMDS) for DVI 1.0
• Low Voltage Differential Signaling (LVDS)
• Single device operating in dual channel mode
• VGA output
• HDTV output