Zalman powersupplies are some of the quietest around since the company focuses on what it calls the Computer Noise Prevention System with every product.

With the recent improvements Zalman have made on their latest model, the ZM300A-APF, we decided to revisit the older 300W ST300BLP and make a few changes of our own. When we first reviewed the ST300BLP we noticed the small internal vents of this single fan PSU and where a bit worried about good ventilation for the case.

As part of the Black Box PSU Mod we wanted to increase airflow from the inside of the computer case and out through the powersupply. To this end, and to improve the overall look of a dull grey powersupply we came up with a series of practical modifications to create the " Black Box Power Supply."