Dell Precision T3913 Quick Reference Manual page 12

For dual-monitor capable cards with one DVI and one VGA connector
Single DVI/Single VGA
DVI
Use the appropriate connector(s) when you connect one
or two monitors.
For dual-monitor capable cards with two DVI connectors
Dual DVI
DVI
DVI
Use the DVI connectors to connect
your computer to one or two
DVI monitors.
12
Quick Reference Guide
Dual VGA With VGA Adapter
VGA
Use the VGA adapter when you want to connect two VGA
monitors.
Dual DVI With One VGA Adapter
DVI
VGA
Use the VGA adapter to connect a
VGA monitor to one of the
DVI connectors on your computer.
VGA
VGA
Dual DVI With Two VGA Adapters
VGA
VGA
Use two VGA adapters to connect two
VGA monitors to the DVI connectors
on your computer.