Corsair SF850 Platinum (2024) PSU Review

Corsair are using the NR092P fan, which is the same fan they are using in the 1000W version of this supply. It is rated 12V 0.22A. As we said before this is a high quality FDB (Fluid Dynamic Bearing) fan which we have seen in the past on a semi-regular basis. There are no plastic strips on the fan to direct airflow to specific parts of the PSU underneath.

This unit is a Great Wall OEM part, like some previous Corsair designs. The PCB is tiny, as you can see in the images above, and very densely packed. The build quality looks very good to me and soldering quality on the PCB is excellent.

It is a half bridge topology design and an LLC resonant converter increases the efficiency levels via lossless switching. On the secondary side a synchronous rectification adopts six FETs to regulate the 12V rail. As usual, the minor rails are generation via a pair of DC-DC converters via a PWM controller.

The primary stage capacitor is a 105c Rated Rubycon rated at 420V 550uF (the SF1000 has a 740uF primary cap). These are quality Japanese capacitors we value highly, alongside others such as Nippon Chemi Con and Nichicon. The power supply offers OCP, OVP, SCP, OPP and OTP protections.

Become a Patron!