A Detailed Look
The Corsair RM850i power supply enclosure is painted matte black with white lettering and measures 180mm (7.1”) long. Note the beveled edges for a distinctive look. The back panel includes an On-Off switch and AC receptacle. The PSU ships with a label over the back panel to make sure you understand that the fan will not start spinning until the PSU is under moderate to heavy load.
The power supply uses a specially designed Corsair NR135P fan that operates in silent Zero RPM mode up to ~40% load (25°C room temperature). The NR135P intake fan was specifically designed to move more air through the power supply components with less noise. Fan blades are properly balanced to prevent resonance at higher RPMs and the fan features fluid dynamic bearings for quiet operation and long life. The fan is rated for 0.22A at 12 VDC.
The front panel incorporates twelve modular connectors for the power cables, all nicely labeled. On the left side of the panel, are the Corsair Link connectors (USB or Corsair Link Commander digital interface), LED, and Fan Test button. The LED turns green when the USB cable is connected and the PSU is functioning properly. When the PSU is communicating with the Link software, the LED will alternate between green and red. If the LED turns solid red, the PSU has lost connectivity with Link. Pressing the Fan Test button causes the fan to turn on when the PSU is operating in Zero RPM mode to ensure the fan is working properly.
Fully Modular Cables
RM850i: (3) PCI-E, (1) 24-pin ATX, (2) 4+4 pin EPS/ATX12V
RM850i: (2) Corsair Link, (3) SATA, (2) 4-pin Peripheral, (2) FDD Adapter
(Courtesy of Corsair)
The RM850i comes with a good assortment of all modular cables and connectors. All of the cables are black, sleeved or the flat ribbon-style, which makes for easy installation with a clean look and helps optimize case airflow.