Corsair RM850x (2018) power supply review - Introduction

Corsair RM850x (2018) Power Supply
Truly stable and now armed with 10 years warranty

We take the RM850x power supply from Corsair to the test today. This 2018 update for the RM series now is offered a silent RMx series that comes with 80plus Gold certification, that means it's 90% efficient at 50% load at 110v and even 92% at 230v. Efficiency matters. The PSU itself is fully modular, for most of you with a side panel window in their chassis a must really as you'll want modular cables. 

The updated PSU has been tweaked on its audibility front with a Zero RPM Fan Mode, which means at low and medium loads the cooling fan switches off entirely for near-silent and passive operation. This 80 Plus Gold certified power supply has silent Zero-RPM fan operation. The product comes with solid capacitors and fully modular cables. The PSU is cooled with a 140 mm fluid-dynamic-bearing fan that will only spin up when the PSU needs to and operating virtually silently at low and medium loads.

As mentioned, the PSU improved on the audibility front as the fan doesn't even spin until it reaches a certain load or temperature, so if your PC is in idle and pretty much-doing nothing, the rather silent fan will actually disable itself. That's right, the thermally-controlled fan spins up gradually above 40% load thus up-to 340 Watt power consumption this 850W PSU makes no noise whatsoever, but even during more stressed usage and when gaming it remains silent really. All in all, we have plenty to show you and test. Mind you that being the mainstream to the high-end range you'll get an added benefit as well, Corsair Professional Series PSUs are backed by an excellent warranty, 10 years now! Hey, that's all gold by itself, have a quick peek and then let's head onwards into the review.