IBM IntelliStation M Pro 6225 Hardware Maintenance Manual And Troubleshooting Manual page 76

Some models come with a digital video interface (DVI) connector for connecting a
digital monitor. If you have problems viewing information with a second monitor, see
the IBM IntelliStation User's Guide on the IBM IntelliStation Documentation CD.
Models with the NVIDIA Quadro FX 1300 or NVIDIA Quadro FX 3400 video adapter
come with a DVI-I to VGA style analog converter for each DVI-I connector.
Important: To get the best performance from the NVIDIA Quadro FX 3400 video
Models with the NVIDIA Quadro NVS 280 video adapter come with a dual monitor
system-59 (DMS-59) to dual-analog monitor pigtail cable. If you want to set up two
digital monitors, you must purchase a separate dual-digital monitor cable.
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IntelliStation M Pro Types 6225 and 6228: Hardware Maintenance Manual and Troubleshooting Guide
adapter, you must connect the video adapter to the computer power
supply. Otherwise, the video adapter will be operating with very limited
power, resulting in a decrease in performance for some applications.
Use the PCI Express x16 external power drop to connect the video
adapter to the computer power supply. The following illustration shows
the location of the video adapter power connector.
Video adapter
power connector