I have iDock-C10 with dual monitor setup, one desktop and one laptop for work.
My laptop is a Lenovo Thinkpad T14 with Thunderbolt™ 4. All my HDMI cables are 2.1 and I connected the iDock to the USB 3.2 Gen 2 on my desktop.
I had 2 1080p monitors at 75Hz and everything worked fine. But I have switched to two 1440p monitors. Now I have 2 problems.
1 - I can’t use my monitors with 2560x1440 resolution and 120Hz or 144Hz. If I connect the display or HDMI port directly to the monitor I don’t have the problem.
2 - Using the laptop I can’t use the 2560x1440 resolution, it is limited only to 1920x1080 on both monitors. But if I connect the USB Type-C cable directly to the monitor it works fine.
In the specifications of the iDock-C10 it says that the device supports 2K resolutions at 120Hz and 144Hz, is it true or not?
Resolution
Support
USB-C: Up to two 4K@60Hz outputs
DP IN/HDMI IN/OUT: 1080P@240Hz/165Hz/144Hz/60Hz,
2560x1440@144Hz/120Hz/60Hz, 4K@60Hz
What should I do to solve these problems?
If anyone can help me I would be grateful.
Thank you.
Only one monitor swicthed to 2560x1440?
Kindly please plug it in to the HDMI out 2 so the desktop can worj with 2560x1440@144Hz, due to the HDMI out 1 cobverted from the DisplayPort input and that would be lost the high refresh rate and only support up to 2560x1440@100hz.
For the laptop,could you try disocnnect another monitor and only connected this 2560x1440 mmonitor for a check does it can work with 2560x1440 resolution? This can double check like you use the USB-C connect to monitor directly.
For the USB-C input port,our product come with DP alt mode and DP MST mode,but not the thunderbolt or Displaylink based,so the two connected monitors working resolution also depends on the laptop graphics card performance while it output multiple video streams thru the single USB-C port.
The second problem was my mistake. My laptop is Thunderbolt 3.0 with DP 1.2 on USB Type-C, so I don’t have enough bandwidth for two monitors at 1440p. I have tested the dock with another laptop with Thunderbolt 4.0 and DP 1.4 and it works fine with 2 monitors at 1440p.
About my first problem, none of the monitors can run at 144Hz using the dock, they are the same Asus Rog Strix XG27ACS monitor, it is limited to 60Hz, but if I connect DP or HDMI direct to the monitor it works fine.
Hello Adrian,
Thanks for your update.
For the resolution issue,it mostly related to the graphics card performance while it output dual video streams via the USB-C port.
When you used the HDMI or DP cable direct connect to the monitor,the HDMI port and DP only output single video stream and its specs support the higher refresh rate.
You can try setup one monitor with 1080P and check does another monitor can work at a higher refresh rate or not.
My problem with laptop connections was my mistake because my laptop has a hardware limitation using the USB C port. I have tested the iDock with another laptop and dual 1440p monitors using the USB C port works fine.
My second problem is with my desktop PC connection. I have an RTX 3060. In the iDock C10 specs it says 1440p/144Hz dual monitor support, but I can only use the monitors at 60Hz if I connect with the iDock. If I connect the monitors directly to the graphics card both monitors work fine at 144Hz and even higher.
Hi Adrian,
Sorry for the confusion.
When your PC conencted to these two monitorsare use the HDMI cable or displayPort cables? And also two monitors connected at the same time?
Have you tried check and update the RTX3060 graphics card driver for a check if possible.
Yes, I have tested with two monitors connected directly at the same time, one monitor with Display Port and one with HDMI. The monitor with display port can work at 180Hz and with HDMI at 144Hz.
