Is it possible to run this USB Miner without a usb hub? I want to connect it directly to my USB3 port. I meant with its stock frequency.
It is possible, but the frequency at which can be run will depend on the specific USB port you are using.
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.