English, 7 dual monitor and surround display features – ASRock A55 Pro3 User Manual
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ASRock A55 Pro3 Motherboard
English
2. If you have installed onboard VGA driver from our support CD to your system 
 already, you can freely enjoy the benefits of dual monitor function after your 
 system boots. If you haven’t installed onboard VGA driver yet, please install 
 onboard VGA driver from our support CD to your system and restart your 
computer.
2.7 Dual Monitor and Surround Display Features
Dual Monitor Feature
This motherboard supports dual monitor feature. With the internal VGA output sup-
port (D-Sub and HDMI), you can easily enjoy the benefits of dual monitor feature 
without installing any add-on VGA card to this motherboard. This motherboard also 
provides independent display controllers for D-Sub and HDMI to support dual VGA 
output so that D-sub and HDMI can drive same or different display contents.
To enable dual monitor feature, please follow the below steps:
1. Connect D-Sub monitor cable to D-Sub port on the I/O panel, or connect HDMI 
 monitor cable to HDMI port on the I/O panel.
When you playback HDCP-protected video from Blu-ray (BD) or 
HD-DVD disc, the content will be displayed only in one of the two 
monitors instead of both monitors.
HDMI port
D-Sub port
