It is possible, but the frequency at which can be run will depend on the specific USB port you are using. Note that you can even use a USB2 port, the main thing that matters is the power delivery of the port, not the data part of it.

If you run it slow, you can plug it in basically anywhere. The higher you run it, the least USB ports will work, and eventually you'll need a fan as well unless you want some melted components.