Corsair RM850x ATX v3.1 PSU Review

Box & Bundle

The box has a photo of the PSU on its front side and the corresponding Cybenetics ratings for efficiency and noise. If you want more data about the PSU’s technical specs, look at the back of the box.

Product Photos

The chassis has a distinct look, with the uniquely shaped perforations that Corsair used for the fan and exhaust grilles. Moreover, the PSU has standard dimensions, allowing for a 140mm fan to offer the desired airflow at low enough RPMs for reduced noise output. On the front side, you will find the power switch, the AC receptacle, and the fan speed control knob. Around the back, the modular board has 14x sockets, one of which is 12V-2×6 type. Corsair didn’t use 2x 8-pin sockets in these PSUs for the high-power PCIe connector, but preferred a native one.

Cables

Modular Cables
Description Cable Count Connector Count (Total) Gauge In Cable Capacitors
ATX connector 20+4 pin (610mm) 1 1 16-20AWG No
4+4 pin EPS12V (750mm) 2 2 18AWG No
6+2 pin PCIe (650mm) 3 3 16-18AWG No
12+2 pin PCIe (650mm) (600W) 1 1 16-24AWG No
SATA (500mm+115mm+115mm+115mm) 2 8 18AWG No
4-pin Molex (550mm+100mm+100mm) 1 3 18AWG No
AC Power Cord (1400mm) – C13 coupler 1 1 18AWG

All cables are embossed, and the PSU has two EPS and three PCIe 6+2 pin connectors, all on dedicated cables, which is the correct/best thing to do. There is also a high-power PCIe connector, set at 600W max power. There are enough cables and connectors to allow the PSU to deliver its full power without any issues, and all cables are long enough to avoid compatibility issues. I only disagree with the short distances between the peripheral connectors.

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One thought on “Corsair RM850x ATX v3.1 PSU Review

  1. Hey Aris, thank you for the review. After my long research and your articles, I finally bought this product (it finally arrived in my country). Is it a problem if the 3.3V channel drops below 3.2? If it is a problem, what causes it?

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