According to on-line specifications, USB 2.0 ports on any computer motherboard are rated for 5 VDC at 500 mA. I have a device that normally runs at 5 VDC at 450 mA. but sometimes jumps to 5 VDC at 590 mA. The device runs perfectly fine even at the higher amperage. Can I damage my motherboard by running this device or would the device just quit working if I exceeded my motherboard's safe limits?