OK, let's beat it to death.
The 3x USB Power Boost from GIGABYTE is designed to deliver the utmost compatibility and stability for USB devices, such as external storage devices or optical drives, by supplying sufficient power
through a single USB port. This will help free-up USB ports for using multiple USB devices on one motherboard.
Yeah I am not worried about Apple stuff. When I say basic devices its stuff like fans and coffee mug heaters, mechanical things, not digital devices that could get screwed over by power spikes and stuff.
Thanks for the advice for relays and other protection extras, I will be sure to implement them.
Also, I am not planning on using the Arduino USB for power, I am just going to solder directly to the DC IN.