Change transparency cdock6/30/2023 If a cable only supports HBR, however, its data rate is not going to be sufficient to support the connections desired. A problem specific to DisplayPort is that the cables supporting DisplayPort 1.1's High Bit Rate (HBR) and DisplayPort 1.2's High Bit Rate 2 (HBR2) bandwidths are both labelled as being "Standard" DisplayPort Cables.This applies equally to the USB-C and DisplayPort cables. If a cable is of poor quality, it may not support the full data bandwidth.Could it be the fault of the cables used (both the USB-C cable and the DisplayPort cables? Yes, it certainly can. I could blame poor components in the dock. I am sorry, I do not understand what is going on. So why is your dock not supporting both of your 1440p monitors at 60Hz? Good question! I've shown that the capability to do so is there. Remember that, if multiple monitors are connected to a DisplayPort channel, the data bandwidth of this channel is shared by these monitors.įrom all this, we can conclude that two 1440p monitors running at 60Hz can easily be supported on a DisplayPort 1.2 channel.LSPCon IC(s) may also be included if HDMI connectors are supported instead of DisplayPort.Your USB-C dock is taking in a DisplayPort 1.2 output stream and, presumably through the inclusion of a MST Hub, supporting connections for two monitors. As an additional data point, I use a MST Hub device to simultaneously connect both a 4K (SDR only) monitor at 60Hz and a 1080p monitor at 60Hz to the USB-C port of one of Intel's NUC devices (a NUC7i7BEH).Some MST Hub devices also include the equivalent of LSPCon IC(s) so that HDMI monitors can be plugged into them.This overcomes (albeit at a cost) the processor's HDMI 1.4a limitation. These are currently being used on PC motherboards, in IC (chip) form, to convert one or more of the the processor's output channels, configured as DisplayPort 1.2 output channels, into HDMI 2.0 output channels. A device called a Level Shifter Protocol Converter (LSPCon) can be used to convert a DisplayPort output stream into a HDMI output stream.A device called a Multi-Stream Transport (MST) Hub can be connected to a DisplayPort channel and support two or three DisplayPort monitors being connected to this channel.This DisplayPort channel is independent of the USB channel also supported. The USB-C connector has pins that support a DisplayPort output channel.The data bandwidth for a 4K HDR monitor at 60Hz is 15.68 gigabits per second.Īnd now USB-C and supporting technologies:.The data bandwidth for a 4K SDR monitor at 60Hz is 12.54 gigabits per second.The data bandwidth for a 1440p monitor at 60Hz is 5.63 gigabits per second.The data bandwidth for a 1080p monitor at 60Hz is 3.20 gigabits per second.Even though you can physically connect up to nine monitors (using DisplayPort 1.2), a maximum of three will be supported. Processors including Intel HD Graphics 620 support a maximum of three independent monitors.Only a single monitor can be connected to a HDMI output stream. If configured for HDMI 1.4a, an output channel will have a data bandwidth of only 8.16 gigabits per second (hint: this will just barely support a 4K SDR monitor running at 30Hz).If multiple monitors are connected to a channel, they share that channel's data bandwidth. You can connect one, two or three monitors to each output channel. If configured for DisplayPort 1.2, an output channel will have a data bandwidth of 17.28 gigabits per second.These channels can be configured to support DisplayPort 1.2 or HDMI 1.4a. Processors including Intel HD Graphics 620 support three independent output channels.Intel HD Graphics 620 can, in fact, simultaneously support three independent 4K (3840 × 2160) HDR monitors running at 60Hz. To attach the report, once you choose "reply" select the "clip" icon on the lower-left corner. Use the option "save all information" to save the. Click on Save All Information (save it in your desktop). In the Run box please type dxdiag and hit Enter. What is the specific model of the HP USB-C dock?ĭid you make any recent hardware/software changes?ĭo you have the option to connect both monitors directly to the laptop without the HP USB-C dock and test the extended mode that way? This is just to rule out a possible restriction from the docking station. In order for us to provide the most accurate assistance, we just wanted to confirm a few details about your system: JAndr35, Thank you for posting in the Intel® Communities Support.
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