According to the DisplayPort standard, DisplayPort 1.2 enabled-products feature a multi-stream technology that allows independent streaming to multiple video displays from a single video output, through the use of monitor hubs or daisy-chainable monitors.
“Daisy chaining” is a term that describes the ability to connect a series of devices together using a single connection between each two devices. The new DisplayPort v1.2 daisy-chainable displays have both a DisplayPort input and a DisplayPort output. The DisplayPort output connects to the next downstream display. This cabling arrangement, with one DisplayPort cable between each set of monitors, provides a less cluttered system configuration.
GPUs usually have an inherent limitation in how many simultaneous displays they can drive; some can drive up to three displays, while others can drive four or even six. For example, the AMD Radeon™ E6460 Embedded GPU supports up to 4 monitors. However, adding additional displays would limit the maximum resolution. Refer to Related Links for additional details.
So, even though DisplayPort 1.2 offers the higher pixel rate available, there is a limitation in how many pixels can be sent down the display pipe. This means that while using a single display allows resolutions of up to 3840x2160 or 4096x2160, using two displays limits the maximum resolution for each monitor to 2560x1600.
If you are having difficulties extending the display to multiple monitors, ensure that you have the PXI Peripheral Drivers
installed on your system. If your controller uses an Intel® HD Graphics controller, make sure your system has the latest Intel graphics driver
. Also make sure that your Display settings are properly configured in Windows Device Manager to extend the display.Note:
While DisplayPort 1.2 allows for 4K resolution, neither the AMD Radeon™ E6460 nor the AMD Radeon™ E6465 Embedded GPUs support 4K resolutions and the maximum available resolution may be limited by the GPU and/or the display itself.Note:
If you are using a DisplayPort splitter with a USB based power input, it may not work if connected to one of the controller's USB ports. If this happens, test the splitter using an external USB power supply or test it on a different computer to verify the splitter is working fine. If the splitter works fine in other system or with external power, please report this to National Instruments Support