We tested the Corsair HX1000i, should we change the power supply for this?

The CORSAIR HX1000i supports the mode modern standby, features Japanese 105°C electrolytic capacitors and carries 80 Plus Platinum efficiency certification, so you’ll understand that this is definitely a high-end power supply model. CORSAIR gives this family of sources a 10 year warranty, so they are more than sure that the product is really good and will last a long time, although it is true that its price is according to the warranty and the range : €238.90.

Finally, we must mention again that this family of sources is fully digital, which means that the LCC topology and DC-DC conversion provide constant and clean energy, avoiding noise and maximizing efficiency.

Unboxing and external analysis

As is customary in power supplies from this manufacturer, the HX1000i is packaged in a black and yellow hard cardboard box on the front side of which a three-quarter image of the product can be seen along with the name and its certification of efficiency, leaving for later more information such as its power table, its ventilation curve or its efficiency curve.

By opening the box, in the form of a chest, you have direct access to the power supply, perfectly protected, and to a cardboard box in which you will find the modular cables and the accessories.


As always, let’s start with the accessories first. CORSAIR includes a European power cord and bag with zip ties and the necessary screws to secure the power supply to a case, as well as a small brochure with safety information. The comprehensive manual that CORSAIR once included in its sources is missing, which, in addition to the instructions for use, included very technical information about the device.

In terms of cabling, this power supply has one cable with a 24-pin ATX connector, two cables with a 4+4-pin EPS connector, four PCIe cables with two 8-pin connectors each, three cables with 4 SATA connectors each and one more cable with three MOLEX connectors and a floppy disk. In addition, a USB-C cable is included to connect the source to the motherboard’s internal USB 2.0 header and thus be able to manage all settings via software.

The CORSAIR HX1000i is quite heavy for what’s usual, it’s a pretty sturdy and solid source on the outside. Aesthetically it does not vary too much compared to other sources of this manufacturer, with its black exterior, its modular connectors and others.


Both sides are adorned with the usual sticker that indicates the brand and model, while in the upper area we have the usual sticker with the power table and the certifications of conformity.

On the back we have a ventilation grille with the mechanical on/off button and the connector for the power cable. There is a sticker that we can remove that informs us not to be afraid if the fan does not work when connecting the power supply, because it is hybrid and that is normal.

On the front, how could it be otherwise, we have the modular connectors. It should be noted that, as is almost always the case, the connector of the ATX cable is split into two connectors, and also the USB-C connector of the control cable, and the status indication LED which we will see later.

Finally, in the lower part we have a grille behind which the 140mm fan is hidden, responsible for bringing fresh air inside the source and thus keeping it at a good operating temperature.


This is what the CORSAIR HX1000i looks like inside

To access the inside of the power supply, simply remove the four exterior screws that are on the side where the fan is located, then pull the part upwards. This already gives us direct access to see all the components, which becomes easier if we disconnect the fan connector to be able to separate the two parts correctly.


The fan bears the reference NR140P, it is 140 mm in diameter and has 7 fairly wide and inclined blades to promote good static pressure and that fresh air reaches all the internal components of the source.


Here’s the inside of the power supply, then we explain what each part is and what it’s for, but at first glance the impression is that they’ve designed a fairly compact and well-organized interior with excellent welds but maybe with too many putty balls in places.


Here you can see what we mean by “globs”, right on the PFC coils of the power supply.


A curious fact is that the two Japanese 105°C capacitors are different in this model, although they come from the same manufacturer.


The solders are as we said excellent, and here you have an example in the input filter, where we also have two Y capacitors for this.


This power supply has several sister boards for different tasks, such as connections or modular wiring.


In the following image we can see the main transformer, with its own passive heatsinks.


And another curious fact is that the digital unit of this HX1000i comes on a sister board which, in turn, has unused connections. This insert contains the PFC + LLC + fan connection + protections.


Next we will see a diagram of the interior, where we will also explain what each part is.

Inside the CORSAIR HX1000i

Legend Last name The description
1 NDE EMC/EMI filter to ensure no outside radiation interference
of them AC DC Incoming AC rectifier
3 PFC coil PFC coil
4 PFCMOS The MOSFETs and diodes that are part of the power factor correction circuit
5 Relay Relay for low current input
6 capacitors main capacitors
seven MOS LLC Half-Bridge Stage MOSFET Matrix
8 digital unit Daughter card for numerical control
9 L Inductive part of the LLC circuit
ten VS Capacitor part of the LLC circuit
Eleven transformer main transformer
12 transformer Transformer for the 5V standby circuit
13 SR card Secondary rectifiers (SR) for the LLC stage
14 DC/DC Transformer from 12VDC to 3.3V and 5V
fifteen 12V Filters for 12V
16 CM card Back plate for modular connections

Testing the CORSAIR HX1000i in a real environment

To test this power supply we used our Alder Lake-S test bench, made up of the following equipment:

  • Intel Core i9-12900K.
  • Be quiet! Dark Rock Pro 4.
  • Heroes ASUS ROG MAXIMUS Z690.
  • TeamGroup Cardea A440 Pro 2TB.
  • GeForce RTX 3070.

At maximum load, this equipment has a theoretical consumption of around 600 watts, so a 1000 watt source like the one we have in hand is clearly oversized. However, for our tests it is not bad, because we will see the values ​​where, in theory, the power supply is the most efficient.

We start by seeing what the software offers us, CORSAIR iCUE, which in its latest version automatically detects the power supply without any problem.


In the cooling tab we can not only monitor all the power values ​​of the source, but also modify and create profiles and custom curves for the fan.


As always, in the Alerts section we can configure what we want to happen when the temperature of the source reaches a certain point that we want.


Finally, in the Device Configuration section, we can modify if we want the source to behave as if it had a single-rail or multi-rail OCP, as the case may be.


We’ll start with the tests by showing you the data obtained for the 80 Plus certification, such as the efficiency graph that you can see below and which shows us excellent data (that’s why it has 80 Plus Platinum, sure) .


In the following graph, which is the difference in power delivered, we can see that the red line is not very thick, which means that the efficiency of the power supply is so high that practically all the energy there enters is the one who leaves.


Finally, in the following table, we can see the empirical data they measured.

Efficiency table

We now go with our own tests and, as always, we used OCCT in its latest version for this. Right from the start, during the 10-minute test at maximum load that we always do, we were able to realize that the voltage values ​​are not only very precise, but also very stable.

The result is frankly excellent, the CORSAIR HX1000i was not disconcerted by our test equipment.


Conclusion and judgment

This isn’t the first time CORSAIR has “joined” the all-digital world, but it’s definitely great news that they’ve decided to create this new family of HXi digital power supplies that offer better stability, control , safety and efficiency than existing analog models, maintaining its characteristic quality and functions that make virtually all sources from this manufacturer considered top-of-the-range.


The CORSAIR HX1000i is the “little brother” of this family, initially introduced with 1000 and 1500 watt peak power models, proving fully primed and ready for the new generations of processors and graphics cards to come. , and whose consumption and efficiency requirements have forced power supply manufacturers to “pull themselves together”.

As always, we can’t recommend this power supply highly enough for its excellent performance, while awarding it our Gold medal (which, it must be said, if it weren’t so expensive, it would almost certainly be Platinum).

Alan A. Seibert