If combining the on board Intel® HD Graphics with a external PCI/PCIe video card, Windows will allow using the two graphics controllers at the same time, but the only dual display mode available is "Extended desktop". If you are looking for other dual display options like "Clone display" then it will be necessary to connect the two monitors into one of the graphics solutions, the on board or the video card so Windows will give you the dual display modes available depending on the graphics adapter.
In order to accomplish this, the most important thing is to change some settings on the BIOS. Please go to the configuration tab>video>integrated graphics device> set to “always enable”
In order to accomplish this, the most important thing is to change some settings on the BIOS. Please go to the configuration tab>video>integrated graphics device> set to “always enable”
The On Board Video is normally deactivated
When you add a PCI X Press Card and even if it wasn't it would still show the primary Display.
As for using a DVI Splitter you can but this normally results in the same display on both Desktops on that DVI Socket. However Dell did have a DVI Splitter that allowed you to extend the Desktop over 2 monitors a while ago. They may still be available but I haven't see on in ages so I'm not sure.
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