Corsair HX850W Power Supply

Author:Paul Johnson

Editor:Kyle Bennett

Date: Wednesday, May 27, 2009

Another week and another company coming in trying to show authority in what is probably the hardest PSU segment to hit a home run in; the 850 watt computer power supply. One has performed great, a few have done OK; where does Corsair fit into the mix?


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 OEM’s (Seasonic and CWT), rigorous standards, and excellent support. Corsair began branding power supplies with the original members of the HX series units, the very well received CMPSU-HX520 (branded as HX520W) and the CMPSU-HX620 (branded as HX620W). Recently though they have established more lines of power supplies to address other market segments with their CX and TX lines. With these lines in hand Corsair has really covered the low to mid range market but has only a few units in the 750W+ market segment. Included in this is a conspicuous gap in the HX line between the HX620W and the HX1000W. Today, however, Corsair rectifies that situation with the introduction of the HX850W and HX750W. We will be looking at the larger of the two, the HX850W, which Corsair is branding in conjunction with CWT.

Channel Well Technology 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, Thermaltake, Corsair, Koolance, and Xigmatek among many others. While most familiar to our US users under the Antec brand 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.

Filling in the Fleet

The HX series of power supplies was the first series of power supplies that Corsair launched and with that ship Corsair set sail on a voyage that would bring 4 different lines of power supplies to port. In all that time though, Corsair has not launched a power supply in the HX series to fill the gap between the HX620W and the HX1000W; until now. Today, we have the HX850W setting sail upon the open waters in an effort to uphold the tradition of excellence that the HX series is known for.

Designed For Enthusiasts! Corsair Professional Series power supplies set a new standard by which all premium PSUs must be judged. Designed and engineered using cutting-edge technology, each Corsair Professional Series power supply is built to the highest quality standards, and delivers the features and performance that technology enthusiast’s demand. Corsair Professional Series power supplies are built using Industrial Grade electrical components, ensuring the stable, clean and reliable voltages that are essential for high-end gaming PCs and workstations. Professional Series PSUs are rigorously tested at 100% load and an ambient temperature of 50آ°C, guaranteeing stability and reliability even in the most demanding, multi-core, multi-graphics card systems. The Corsair Professional Series HX850W PSU utilizes advanced DC-to-DC circuitry and meets 80 PLUS SILVER certification standards for up to 90% energy-efficiency*, reducing wasted energy and lowering the amount of excess heat generated. Corsair Professional Series power supplies are built using Industrial Grade electrical components, ensuring the stable, clean and reliable voltages that are essential for high-end gaming PCs and workstations. Corsair Professional Series power supplies boast an innovative cabling configuration that uses low-profile, flat modular cables that reduce air friction to help maximize airflow through the computer chassis. The modular design also simplifies installation as it allows unprecedented flexibility in utilizing only those cables which are needed.

The Corsair Professional Series is backed by an industry-leading 7-year warranty and comprehensive customer support via telephone, email, forum and the Tech Support Express helpdesk.

Let's move on to see what we have to look forward to when we purchase the Corsair HX850W in terms of documentation, accessories, cable count, rail layout, output characteristics, and general build quality.