I have a Razer Mamba mouse which is charged through it's docking station. The problem is that the station turns itself off when I disable my computer.
Can anyone tell me if it's possible to keep at least some USB ports powered when the PC is turned off? Are there some settings that I should tweak.

Oh I almost forgot... The preferred method would be (but I don't know if it's possible) to only enable some USB ports (like USB 2.0 or USB 3.0) because I also own a Razer Megalodon headset (also USB) that would power on if I would turn on all the ports.

Do you guys have any idea how to do this?

My old board had a PCI USb card that would power off and motherboard USB would be powered on. I also wouldn't mind having my set powered on. It's a inconvenience but a minor one comparing to not being able to recharge my mouse at night.

Thanks for the help