A Detailed Look
The Corsair HX850 Platinum power supply enclosure is painted with a semi-gloss black finish and measures 180mm (7.1”) deep. The back panel includes an AC receptacle, main power On-Off switch and open honey-comb grill.
The power supply uses a high-quality Corsair labelled 135mm, seven blade fan on the bottom for cooling. The fan (NR135P) is rated for 0.22A at 12 VDC and uses a Fluid Dynamic Bearing (FDB) for quiet operation and long life. The HX Series power supplies all feature Corsair’s ZeroRPM mode for fanless operation at low output power levels.
The HX850 front panel has thirteen modular cable connectors that are nicely labelled and keyed so you don’t inadvertently plug a cable into the wrong connector. The small switch on the left allows selecting either Single or Multiple +12V rail output mode.
The PSU comes with a good selection of all modular cables. All of the main power cables are sleeved while the peripheral device cables are the flat ribbon-style. Our only minor quibble here is having two PCI-E connectors daisy-chained onto one cable.
Under the Hood
Here are a few pictures showing the layout and components inside the new Corsair HX850 power supply. Corsair is using Channel Well Technology (CWT) as the OEM for the HX Series.
The HX850 Platinum features a modern LLC resonant circuit design with DC-to-DC converters for high efficiency operation. The layout of components is clean while the soldering appears to be good. All of the capacitors used inside the PSU are high-quality Japanese made electrolytic and solid polymer caps rated for 105°C. For example, the HX850 uses two Nippon Chemi-Con KMW bulk capacitors rated for 470uF, 400V and 105°C.