1. An apparatus comprising: a system test module that initiates a system power test for a computer system, the computer system comprising one or more power supplies providing power to a plurality of system components, the system power test comprising determining power system characteristics under various loading conditions; a configure module that configures a system component of the plurality of system components during the system power test, the system component using a higher amount of power after being configured than in a previous un-configured condition; a de-configure module that de-configures the system component during the system power test, the system component using a lower amount of power after being de-configured than in a previous configured condition; and a diagnostic module that measures power system performance of the computer system during varying loading conditions caused by configuring and de-configuring one or more system components by the configure module and the de-configure module.