[NAME]-Yo  1080p 240 Hz is equivalent to 4K 60 Hz from a bandwidth perspective, and since the dock can run dual 4K 60 Hz, then yes you at least should be able to run dual 1080p 240 Hz -- but I don't have the equipment to confirm that personally, and there's always the possibility of bugs preventing setups that should work from actually working.  The x17 R1 appears to support DisplayPort HBR3 over Thunderbolt, which in conjunction with how the WD19TBS allocates video bandwidth when paired with such systems means you should avoid connecting one of the displays to the downstream TB3 port.  Try using the two DP outputs, for example.In terms of gaming, I haven't encountered reports of stutter, although if people are using wireless keyboards and mice, then USB 3.x can create interference with the 2.4 GHz radio frequency that is widely used for peripherals (and even WiFi and Bluetooth), so it's possible that the dock doesn't handle that very well.  In that case I guess you could try connecting that dongle directly to your system to see if it performs better in that regard.  But I wouldn't expect the dock to introduce display latency.  The Thunderbolt output that the dock is plugged is itself wired directly to the GPU for its video feed, so unless the Thunderbolt controllers add some latency, I wouldn't expect that to be an issue.  That said, I haven't researched that specific concern before.
I bought an Alienware x17 R1 and want to use it together with a WD19TBS and two 1080p 240Hz AW2521 monitors. I just can’t figure out if I’ll be able to use both displays at 240Hz at the same time? Technically it doesn’t really matter since I can’t look at both of them at the same time. My second question is if should use the dock for gaming? I’ve heard that people have had issues with mouse and keyboard stutter. Does it even make sense to use the dock regarding screen latency?
x17 R1, WD19TBS, dual AW2521 1080p 240Hz