Older Mac Pros with USB 3.0 PCI Express add-on cards may not work with this or any USB 3.0 hub. The Apple SuperDrive is not compatible with this or any other USB hub (see Apple HT201788). 2.4Ghz wireless devices such as keyboard/mouse receivers, Bluetooth and WiFi adapters, may not work in close proximity to USB 3.0 devices or hubs.
https://www.amazon.com/Plugable-Port-USB-Power-Adapter/dp/B075NMVGP7