The stick does not have any temperature sensor.
A great way to figure out what current your hub will run would be to measure the input voltage, if it starts to sag that means you're burning power inside the hub.
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novak
I see, i think with my technical skill, i will use a laser thermometer on the back of the pcb. (For the temp)
However i did finally got a decent multimeter so it would probably good to learn a bit that way. By sag you mean i should figure out how to check the voltage of the usb port under load and if its not at the voltage it should be, i've found the hub's limit?
You expect a bit of sag in the voltage, especially if there are any long power cables. But since power=V*I you can find out how much power is being wasted in the hub by multiplying the current draw by the voltage dip. Example: nominal voltage is 5.00V and when you plug in a stick that pulls 2.00A you notice that the voltage sags to 4.90A. The power loss then is (0.10 volts) * (2.00 A) = 0.2 watts. This isn't much, so you're probably fine, but if you see voltage really dipping down then you might start to worry. Really large voltage sag indicates that you are dissipating a lot of power in your hub, which means the resistance is pretty high for that much current.
I finally uploaded the Minera mod image that includes Compac support.
Thanks!
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novak