User Guide • PC3-ALLEGRO • CompactPCI
®
PlusIO CPU Board • Intel® i7-3xxx Processor
Graphics Subsystem
The graphics subsystem is part of the Intel Core
TM
i7 processor and the PCH QM77. While the graphics
controller is located within the Core
TM
i7 processor, the different interfaces like DisplayPort and VGA
are moved to the PCH. The PC3-ALLEGRO offers two Mini DisplayPort (mDP) interfaces in the front
panel.
Adapters to convert Mini DisplayPort to any other popular interface standard are available.
A 3
rd
DisplayPort is fed to the on-board connector J-SDVO. EKF expansion boards like PCS-BALLET
feature the possibility to gain access to the 3
rd
DisplayPort interface.
As an option, the PC3-ALLEGRO can be equipped with an ordinary HD D-Sub 15-lead connector (VGA
style). This connector is suitable for analog signals only. Nevertheless also flat-panel displays can be
attached to the D-Sub connector but with minor reduced image quality.
Independent from the video connector actually in use, Mini DisplayPort, DVI or VGA, the VESA DDC
standard is supported. This allows to read out important parameters, e.g. the maximum allowable
resolution, from the attached monitor. DDC Power, +3.3V or +5V on DisplayPort or VGA connector
respectively, is delivered via a resettable fuse to protect the board from an external short-circuit
condition (0.5A).
Graphics drivers for the Core
TM
i7 can be downloaded from the Intel web site.
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