Corsair HX620W is a terrific power supply and won’t let you down. In our tests it could really deliver its labeled power at 50º C, showed a terrific voltage regulation, it was very quiet, produced a very low electrical noise level and its efficiency was of at least 83%, peaking 88%. And the best of all: we could extract up to 746 W from it. So you will be basically paying for a 620 W product and bringing home a 740 W power supply.

We like modular cabling systems as you can add only the cables you will really use, keeping your computer organized and helping the PC internal airflow – the fewer things on the way, the better. And this unit provides more cables and connectors than you probably need.

First it has two video card power cables – now with 8-pin option, saving you headaches if the 8-pin plug becomes standard on forthcoming video cards –, which is required if you have or are thinking of an SLI or CrossFire system. Second, it provides a total of eight SATA power connectors – even the most hardcore enthusiast will find this number more than enough. Third, it provides 10 peripheral power connectors, way beyond what you will ever need. And fourth, it comes with two “Y” adaptors, one for converting any peripheral power plug into two floppy disk drive power plugs and the other to transform any peripheral power connector into two connectors, facilitating the installation of fans that use this kind of connector.

Finally we have the five-year warranty in the US.

In conclusion, Corsair HX620W is one of the best power supplies you can find on the market, pleasing both average users and enthusiasts.

The only “bad thing” we can find about this product is its price. Unfortunately it isn’t the cheapest power supply around.