[NAME]  If you want to run all of those displays from a dock, the only way to achieve it would be with a Thunderbolt dock that supports DisplayPort DSC, because Thunderbolt doesn’t have enough bandwidth to run that setup with uncompressed video, even before considering any non-video traffic you may want to run. The only dock I know of right now that could work would be the Lenovo Universal Thunderbolt 4 dock here. The top table for 2021 systems with DisplayPort DSC support here indicates that it can run quad 4K 60 Hz, which is roughly the same bandwidth as dual 4K 60 Hz + single 4K 144 Hz. Obviously Lenovo’s documentation won’t directly account for Dell systems, and I’m not even sure your system supports DisplayPort DSC, although I believe it does. Note also that you may need to use specific combinations of outputs on the dock to achieve your desired setup as noted in the table. But if that doesn’t work, then you may have to run 1-2 displays through some other output(s) on your system rather than trying to send everything through the dock. A dock power output of 90W typically means that’s what it provides for the system AFTER reserving some capacity on its own larger power source to run itself and any accessories you connect. Current Dell docks that provide 90W are themselves powered by 130W adapters, for example. 90W would not be sufficient to run your system adequately, so you can and should keep your system’s own power adapter attached as well. You won’t damage anything. Good luck, and if you try that dock, please report back about whether it worked for your rather high-end setup!
hi,  I have an Alienware x15, rtx3070, 32g, 1TB ssd, 240hz QHD display I want to connect this laptop to 3 monitors: one 4k @ 144 hz and two 4K at 60zh.   1) What kind of thunderbolt 4 docking station shall I use?  I knew 4k @ 144hz needed HDMI 2.1 to reach 120.   2) Is the power output at 90W enough to power both my laptop and other devices? 3) can I charge the laptop using the native power supply (240W)  and the docking station power supply at the same time?  Thanks
x15, 3 monitors docking solution