Since the fan doesn’t turn on until it’s needed, you’ll enjoy virtually silent operation at low and medium loads. The HX850 features full range fan control with a passive mode, meaning that the PSU’s thermal circuitry will not even start the fan unless airflow becomes necessary. I always like to see a mixture of straight and 90 degree angled SATA connectors, as it can help the build phase in some chassis. This time around it still has the same I/O specifications and awesome seven year warranty, but comes with increased efficiency, better connector availability and a slight aesthetic redesign. As we've seen from almost all the power supplies in the last few years, voltage regulation has been improved by just about everyone and almost all units are within 3% of ATX specifications.

One of Corsair's newest PSU families is the revamped HX series, which includes four models with capacities ranging from 750W to 1200W. years would pretty much go to some of the earliest Corsair PSUs, which started from Seasonic M12 based HX520/HX620. I might get a 3080 that's factory overclocked so I don't really know if that factory overclock will push me over 850w or not. The insulation material is probably not used mainly for protection but to prevent electromechanical vibrations that would result in noise (also known as “coil whine”).

Corsairs' adoption of 105c rated Japanese level capacitors is giving them plenty of confidence with the longevity of their products. You can toggle the rail modes using the switch on the PSU, In the SINGLE position, the full output capability of the power supply’s +12V rail is available to any and all connectors, while on MULTIPLE each connector has Over-Current Protection so no more than 40A of current can be delivered to each cable.

All of the electrolytic capacitors are supplied by Nippon Chemi-Con, as are nearly all of the polymer capacitors as well. A lot rests really on how it has been used - a cramped case with the system under heavy load for many hours a day I'd be wary, lighter use with only a few hours of gaming a day it will probably be OK for awhile yet. This means that the power supply must perform at 87%/90%/87% efficiency at 20%/50%/100% loads respectively. A couple of the polymer capacitors are supplied by Nichicon, ensuring that only capacitors from Japanese companies can be found in the HX850.The company is constantly upgrading/adapting the products of each series with new revisions, but the specific market group for that series always remains unchanged.