The unit itself comes in an attractive black enclosure, which will definitely look sharp with a black aluminum case.
Part of what makes Zalman's power supply run silently is due to the implementation of the auto-speed fan control built in it. When the PSU runs in a cool environment, the fan will automatically adjust to the lowest speed thus making it run as quiet as possible. But, should the PSU runs hotter, the fan will increase its speed in order to provide adequate cooling.
Notice the lack of a U.S. / European voltage switch found on just about all power supplies? The Zalman ZM400A uses Active PFC (Power Factor Corrections). Unlike most passive PFC power supplies where you have to set the operating voltage to either 115 or 230 with a switch, The Zalman PSU can be used with anywhere from 100 to 240V. Amazing!
The power connectors here are the same as can be found on most power supplies. The Zalman includes a standard 20-pin ATX connector, a 4-pin Pentium 4 ATX connector, a 6-pin AUX connecter, 7 large 4-pin peripheral connectors (hard drives and CD-ROMs), and 2 mini 4-pin connectors (floppy drives). Unfortunately, no SATA power connections of any kind are present. Something for a future revision, perhaps.
Here is the other noise reduction method on the ZM400A. Instead of extra fans, the Zalman features massive internal heatsinks. This makes the PSU large and quite heavy, but passive heatsinks make absolutely no noise whatsoever, which is what Zalman is gunning for.
