I'm the annoying twat who pops up in support threads and says "use a powered hub"

I use a Roccat Apuri, plugged into the Xim's mouse port. I only have the mouse plugged in, the kb has low power requirements, so I keep that on the Xim.
I have a Nav controller (no real reason, just for fun), Stinkyboard and another USB hub plugged into the hub connected to the Xim. Everything works and plays friendly, though the first time you set it up, try just the mouse and / or kb before adding extra stuff to the hub.
I've never seen a power fault symbol on my Xim, but it will go into an endless reboot cycle if I don't use a powered USB hub. Either that, or I can't use the gear I own the way I want, e.g. my Razer Ouroboros won't work wired with the Xim and bombs BlueTooth in wireless mode.
I also can't get my Titan One to work reliably with the Xim 4 unless I use a powered hub to take the power strain off the Xim.
I previously had issues supplying enough grunt to the Xim 3, Edge and Xim 4, so had the Xim plugged into the Apuri to alleviate, though never solve, those problems. Simply moving the hub behind the Xim instead of in front of it resolved all issues and I've had zero problems since.