A Detailed Look

The Enermax Platimax DF 850W power supply enclosure has a hammer-tone matte black finish and features a black-chrome trim plate around the free-flow wire fan grill. The chassis measures 160mm (6.3”) deep, which becomes more significant at the higher outputs. The back panel includes an AC receptacle, main power On-Off switch and the D.F. Switch that is used to activate the Dust Free Rotation feature.

Dust Free Rotation™ is one of the Platimax DF PSU’s more unique features and self-activates when you turn on (startup) the PSU. It works by causing the fan to momentarily reverse rotation and spin in the opposite direction to dislodge dust and keep it from building up on the fan blades. Pressing the D.F. Switch will also cause the DF function to activate any time you feel the need.

The power supply uses a 140mm, seven blade fan on the top for cooling.  The Enermax labelled fan (ED142512W-FA) is rated for 0.10A at 12 VDC and uses a Twister-Bearing for quiet operation, with a MTBF of 160,000 hours.

The front panel on the Platimax 850W PSU incorporates eleven modular cable connectors, all nicely labelled and keyed.

All of the modular cables are composed of individually sleeved wires so keep those wire and cable ties handy.

Under the Hood

Here are a few pictures showing the layout and components inside the Platimax DF 850W power supply.  Enermax is using Channel Well Technologies as their partner and OEM for the Platimax DF Platinum series.

The power supply uses an LLC resonant topology to lower power losses and boost efficiency during switching along with DC-to-DC converters to generate the +3.3V and +5V outputs from the +12V supply.

The layout of components is clean while the soldering appears to be good. All of the electrolytic capacitors used inside the PSU are Japanese made and rated for 105°C. For example, the two primary bulk capacitors is made by Nichicon and rated for 390uF, 400V and 105°C.

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