Corsair TX850W Power Supply

Author:Paul Johnson

Editor:Kyle Bennett

Date: Friday , December 19, 2008

Corsair reaches out to grab the part of the power supply market that could easily be thought of as the enthusiast "sweet spot." 600 watts too little...1000 watts too much....ah, 850 watts, just right. Can Goldilocks stand up to [H] PSU testing?


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 with two units, the very well received CMPSU-HX520 (branded as HX520W) and the CMPSU-HX620 (branded as HX620W). Recently it has established a new line of power supplies and released two more units, the CMPSU-VX450 (branded as VX450W) and the CMPSU-VX550 (branded as VX550W). Not content to stand still Corsair has gone ahead and introduced a third line of power supplies, the TX series, which we will be covering today. The TX series currently consists of the CMPSU-TX750 (branded as TX750W) and the CMPSU-TX650 (branded as TX650W). Today however Corsair is adding another member to the TX family, the TX850W that Corsair is selling in conjunction with builder 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, 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.

Pirate in the Middle

The Corsair TX850W is the second member of the TX family we have seen now and it seems to be aiming to fill the gap in Corsairs product line that has existed since the introduction of the HX1000W. The real question then becomes is this just to fill gaps or is this unit actually something users should be excited about? Granted this unit is not from Corsair's premium HX line, but at the same time it isn't from the VX mainstream or CX budget lines so besides shedding the modular cables of the HX line this unit should be about close to the top in quality from Corsair.

Advanced Technology, High Performance

Enthusiasts looking for the optimal in price performance PSU technology will find the Corsair TX series of PSUs will meet even the most demanding of required specifications.

The Corsair TX power supplies are engineered using advanced technology and components typically found with high performance power supplies. With design features such as a dedicated, single +12V rail offer the maximum compatibility with the latest system components. Energy efficient circuitry capable of delivering greater than 80% efficiency ratings across 20%, 50%, and 100% load conditions make the TX family of PSUs ideal for the value/quality conscious enthusiast. With a large 140mm diameter temperature-controlled fan that is ultra quiet, yet still more than sufficient to cool the internals of the system, reliability and stability are no longer worries for the gamer, overclocker or enthusiast and high-end system builder.


The TX series delivers a continuous full rated output through a dedicated single +12V rail for a maximum output rating of 70A and is engineered to exceed the requirements for even the most power hungry computers.

Energy Efficient

The TX series utilizes energy efficient circuitry capable of providing 80%+ efficiency while generating less heat.

Quiet and Cool

A high quality 140mm diameter thermally controlled Yate-Loon fan delivers excellent air flow with whisper quiet operation.

Fully Compatible

The TX series of PSUآ’s support both Intel and AMD processor-based platforms and includes all the necessary connections for key components including PCI-E 8-pin and SATA connectors.

Supports Dual Graphics cards

The TX series of PSUآ’s are fully compatible with dual graphics card configurations.

Now that we know what Corsair expects from this power supply letآ’s see what we have to look forward to when we purchase the Corsair TX850W in terms of documentation, accessories, cable count, rail layout, output characteristics, and general build quality.