On the other hand, packaging for some self-powered hubs states explicitly how many of the ports ports can drive a 500 mA full load; for example a 7 port hub that supports a maximum of 4 full load devices.
On the other hand, the packaging for some self-powered hubs states explicitly how many of the ports ports can drive a 500 mA full load at once. For example the packaging on a 7 port hub might claim to support a maximum of 4 full load devices.