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Appendix B
Multi-GPU Systems
Monitor Icons: Windows Vista Versus Windows XP
This section describes how monitors are ordered when not all the displays in a multi‐
GPU system are connected or enabled under Dualview.
Monitor Icons Under Windows XP
• Each GPU is represented by a monitor icon, regardless of whether a monitor is
connected to it.
• If a secondary display on a GPU is connected but not enabled under Dualview,
there is a monitor icon for that display but it is grayed out.
• If a secondary display on a GPU is not connected, there is no monitor icon for that
display.
Monitor Icons Under Windows Vista
• The Display Properties page shows all the monitors that can be supported by the
graphics cards in the system, even if they are not physically connected.
• If a display is not connected, or connected but not enabled under Dualview, the
corresponding monitor icon is grayed out.
Monitor Order Example
Table B.3 shows the general monitor numbering under Windows Vista and Windows
XP when only some of the displays are connected. Monitor numbers are always
sequential, even when displays are not connected.
Table B.3
Windows Monitor Numbering Example–Six Potential Displays
Connector
Position
Connection
Status
Monitor Number
Under Windows
Vista
Monitor Number
Under Windows
XP
GPU0—Output 1 Connected 1 1
GPU0—Output 2 Connected 2 4
GPU1—Output 1 3 (grayed) 2 (represents
GPU1—Output 2
4 (grayed)
GPU1)
GPU2—Output 1 Connected (not 5 (grayed) 3 (grayed)
enabled)
GPU2—Output 2
6 (grayed)
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