corsair_hx1000i_1000w_power_supply_review - 1 HARDOCP - Corsair HX1000i - Corsair HX1000i 1000W Power Supply Review

Corsair HX1000i 1000W Power Supply Review

Corsair's HX series represents its "second tier" line of enthusiast computer power supplies, but its new HX1000i does take the top spot when it comes to its ~1000 watt power supplies that are Platinum certified and fully modular. Let's see if this latest addition from Corsair represents its quality pedigree of days gone by.


Corsair is known in enthusiast circles as a supplier of high performance memory and has risen to become one of the most talked about power supply brands around. Corsair was initially able to establish a presence in such a short time through the use of quality OEMs (Seasonic and CWT), rigorous standards, and excellent support. Since its entrance into the PSU field, it has established a number of lines of power supplies of varying quality to address (and overlap) just about every market segment. Today, Corsair brings us another model in its HX line; the HX1000i (CP-9020074-NA). This unit is once more produced 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, Thermaltake, Xigmatek, and Corsair. While most familiar to our US users from when CWT used to provide OEM services for Antec; CWT is one of the more complete OEM manufacturers as it has a fairly high level of vertical integration providing transformers all the way up to its well designed independently regulated SMPS. However, CWT has been stretching out over the last few years and it is providing OEM services for a number of brands as today’s unit demonstrates.

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First gain the victory and then make the best use of it you can. -Horatio Nelson

The Corsair HX1000i is the newest member of the HX series of power supplies from Corsair. Over the years, we have seen a number of HX units including two other ~1000 watt models (the HX1000W and the HX1050). The most recent of these units, the HX1050, originally debuted back in 2011 and it probably could use a refresh given the rise in quality we have seen from so many other vendors these days. That said, Corsair has had a bit of a tough run lately as its power supplies that we have been able to review have not been nearly the same quality as what Corsair built its early reputation on. Today though, hopefully Corsair has been able to get off the shoals and once more turn its sails to the wind with the new HX1000i. Before moving on to see if this ship has carried Corsair to victory day, let’s see what Corsair expects from this ship:

HXi Series power supplies give you extremely tight voltage control, virtually silent operation, and a fully modular cable set. With all Japanese 105C capacitors, they’re a great choice for high performance PCs where reliability is essential. 80 PLUS Platinum efficiency reduces operating cost and excess heat, and together with Zero RPM Fan Mode technology, gives you virtually silent operation.

With Corsair Link Digital support, you can monitor power supply performance, toggle single rail or multi rail mode, and control fan speed directly from your desktop. And, the fully modular, low profile cable set makes builds and upgrades easy, with clean, great-looking results.

Quiet, efficient operation

80 PLUS Platinum efficiency and Zero RPM Fan Mode mean that at low to medium loads, the fan doesn’t spin at all. And when you do push the HXi hard, the thermally controlled fan spins only as fast as it needs to.

But that’s not all. It’s quieter than most PSUs when the fan’s not spinning, too. The HXi is built with capacitors and other internal components specially selected to reduce coil whine and other electronic noise.

Corsair Link Digital for advanced monitoring and control

Connect the included cable to a motherboard USB header and download the free Corsair Link Dashboard application for Windows and you can monitor performance and efficiency, toggle single rail or multi rail mode, and control fan speed directly from your desktop.

Easy Installation

The fully modular, low-profile cable set allows for quick and easy installation and great-looking builds. The fan self-test switch lets you quickly confirm operation before you even attach cables to your motherboard.

Moving on let’s see what we can expect when a user purchases the Corsair HX1000i power supply in retail in terms of documentation, accessories, cable count, rail layout, output characteristics, and general build quality.