We would like to thank Corsair for supplying the review sample.
Corsair's HXi line is classified as their second-best, under the flagship AXi series. All HXi family members are made by Corsair's favorite OEM, Channel Well Technology, or CWT, and the new models not only feature Platinum efficiency and a fully modular cabling design, but also digital-monitoring functions. As it seems, Corsair is keen on bringing digital goodies to the general crowd, so they are now including these circuits in series other than their top-performing, pretty expensive AXi line. The original digital control- and monitoring design in Corsair products was implemented by Flextronics, but CWT obviously managed to familiarize itself with the technology because of Corsair's help, to a degree, since Corsair has by now collected a lot of experience with utilizing digital circuits in PSUs. Offering much higher efficiency levels and drastically better overall performance because such circuits are also used for control, not only as a bridge to connect analog circuits to the corresponding software, they will hopefully find their way into mid-level and, why not, mainstream units.
Today's review subject will be the HX1000i, the second-strongest of the line since the user's manual says there to be a 1.2 kW HXi PSU at the very top. This PSU is for enthusiasts who need top-notch performance and all the bells and whistles digital monitoring offers, without breaking the bank by buying an AXi unit. We should also note that the AXi units currently don't have a representative in the 1 kW category, which is considered pretty popular amongst enthusiasts. Corsair meant to breach the gap with a HXi unit; however, it would be great of them to release an AXi PSU with the same capacity in order to also offer highly demanding users a 1 kW unit.
Corsair HX1000i Features & Specs
Max. DC Output
80 PLUS Platinum
Intel Haswell Ready
0°C - 50°C
Over Voltage Protection Under Voltage Protection Over Power Protection Over Current Protection Over Temperature Protection Short Circuit Protection
135 mm Fluid Dynamic Bearing Fan (NR135P)
150 mm (W) x 86 mm (H) x 180 mm (D)
ATX12V v2.4, EPS 2.92
Price at time of review (exc. VAT)
The new HXi units had their efficiency upgraded compared to the previous HX generation, are fully modular, and compatible with the sleep states Intel's Haswell CPUs introduced. A silent-enough fan of good quality and with a fluid dynamic bearing is used to keep the unit cool, and all available protections including OCP are available in the Corsair Link software. Please note that in its out-of-the-box state, the unit is a single +12V rail unit (according to new info received from Corsair after the review was published the unit has multi +12V rails out-of-the-box however Corsair Link during the first start sees it as a single +12V rail one, due to a software bug). At seven years, the warranty is pretty long, and the price looks decent enough given this unit's digital-monitoring features.
Corsair HX1000i Power Specs
Total Max. Power
The single +12V rail can deliver the unit's full power alone, and the minor rails are strong too. The 5VSB rail can deliver 3 A, so it's a little stronger than the mean.
We should also mention that enabling multi-rail mode through Corsair Link will also enable Over Current Protection (OCP). According to Corsair, this unit's +12V OCP is set to 40 A on each modular 8-pin connector (for PCIe and EPS connectors), 40 A on the 24-pin ATX connector, and 40 A for all the 6-pin modular SATA and peripheral connectors combined. (note: Corsair informed us that out of the box the unit has multiple +12V rails, although Corsair Link during the first run shows it as a +12V rail one allowing you to enable the multi-rail mode. This is a software bug that will be fixed soon.)
Cables & Connectors, Power Distribution
ATX connector (605mm)
4+4 pin EPS12V (795mm)
4+4 pin EPS12V (650mm)
6+2 pin PCIe (600mm+150mm)
4 pin Molex (440mm+100mm+100mm+100mm)
FDD adapter (+100mm)
C-Link I2C cable (+800mm)
C-Link USB Mini to Motherboard Header cable (+800mm)
Like every modern 1 kW unit, this one has two EPS and eight PCIe connectors, and all of them are available at the same time. To cover every need, Corsair made sure to equip this unit with plenty of SATA and peripheral connectors. Regarding cable length, the ATX cable is long enough, and one of two EPS cables is actually very long. The distance between SATA connectors will suffice, but we would like to see a bigger gap between peripheral connectors. All connectors except for those of the FDD adapters, which utilize thinner wires since very small amounts of current pass through them, use standard 18AWG gauges.
At the front of the box is a photograph of the unit with the side and rear exposed. The model number is given in large white- and pale-blue font, and above it are several icons. These describe the seven year warranty, semi-passive operation, compatibility with Corsair Link, 80 Plus Platinum efficiency, and quiet overall operation. The word "Platinum" has been put into a silver-lined box in the top-right corner, an obvious reference to the unit's efficiency certification.
Only the model number is shown on this side.
On top, Corsair provides a list of all available connectors and cables, with their length—incredibly useful information not only for reviewers, but a lot of users.
Two graphs on the back of the box depict the unit's efficiency curve and the fan's noise output throughout the unit's entire operational range. A second graph below shows that the HX1000i operates passively at up to 400 W, with operational temperatures below 25°C. A paragraph in many languages also details the most crucial aspects of the Corsair Link software, and the power specifications table is in the in the bottom-right corner.
As we are used to in Corsair products, two thick pieces of packing foam protect the PSU inside the box well. It also comes inside a nice velvet bag, which is definitely a nice touch for a PSU of this price range.
The bundle includes a pouch for storing all modular cables, a set of zip ties, fixing bolts for mounting the PSU to the chassis, a case badge, and, for our sample, an AC power cord of the US-type.