At best you get 5V and then only 200 to 250 milliAmperes (mA). So no one may have this fan you will have to try it and measure the current draw. At my home lab I have an Ammeter and this nifty thing.
I've got a Thermaltake TT-8025 DC 12V .16amp 3" diameter computer fan and a usb to micro usb cord.
My question is, can I splice these together to power the fan (which I'm installing in a cabinet for ventilation)?