Corsair HX1000W PSU Review

Author:Paul Johnson

Editor:Kyle Bennett

Date: Monday , April 21, 2008

Corsair has quickly become a mainstay among enthusiast PSUs. Today it breaks new ground by joining the 1 kilowatt club. Doing 1000w is easier said than done and doing it well is tough. Is the HX1000W worth your consideration?


Corsair has been known among enthusiast circles as a premier supplier of high performance memory for quite some time and has recently risen to become one of the most talked about power supply brands around. Corsair was able to establish such an amazing presence in such a short time through the use of quality OEMآ’s (Seasonic and CWT), rigorous standards, and excellent support. Corsair began branding power supplies a short two years ago and to date the entire line of Corsair branded units we have reviewed has been excellent. However, Corsair has been slow to move into the upper reaches of the power supply output realm. Until today, the most powerful unit in Corsairآ’s lineup was the TX750W. Today Corsair adds a new member to its HX line of power supplies, the HX1000W (CMPSU-1000HX) built in conjunction with CWT.

Channel Well Technology (CWT) was founded and began manufacturing power supplies in 1993. Since 1993 Channel Well Technology products have shown up under various guises including Antec, Xclio, 2theMax, CWT, Hiper, ThermalTake, and now Corsair. While most familiar to our US users from when they used to provide OEM services for Antec, CWT is one of the more complete OEM manufacturers as they have a fairly high level of vertical integration providing transformers all the way up to their well designed independently regulated SMPS. Recently however, CWT has begun stretching out and is providing OEM services for a number of brands as todayآ’s unit demonstrates.

Le Soleil Royale?

The 1000w market has been one in which the majority of popular power supply brands have leapt into with both feet. However, conspicuously absent from those brands has been Corsair for some time now. While putting out a bad 1000w product fast is certainly not a good plan waiting too long to enter a market can be as well, and the 1000w market has certainly become crowded as we have seen no less than 9 different models from a number of different OEM's previous to this power supply. So what exactly does Corsair hope to provide in to differentiate the HX1000W from what has become a marquee field in which most every competitor has already entered?

The HX1000W joins the family of well received HX Series Enthusiast Grade Power Supplies known for their rock solid stability, enhanced modular cable design and high efficiency. The Corsair HX1000W Power Supply sets a new standard by which all other high wattage power supplies will be judged. The Corsair HX1000W features six PCI-Express connectors, both 6-pin and 8-pin compatible, to power multiple high-end graphics cards and two EPS12V connectors for dual CPU configurations. The truly independent dual transformer, dual rail design allows for optimum load balancing resulting in greater performance and stability. Industrial-grade 105آ°C primary, secondary and solid state capacitors provide up to four times the lifespan of traditional components. The HX1000W not only delivers one thousand watts of clean power for the highest performance enthusiast systems, it does so at greater than 80% efficiency thanks to the double-forward switching design and multiple rail DC-to-DC converter. Due to its best-in-class efficiency the HX1000W is able to run cool and quiet with only a single 140mm thermally controlled fan.

The marketing sounds good, but can the HX1000W really deliver on all its promises? Was Corsair cooking up something really special with the HX1000W that took it so long to reach market? Let's first letآ’s see what we have to look forward to when we purchase the Corsair HX1000W power supply in terms of documentation, accessories, cable count, rail layout, output characteristics, and general build quality.