Specifications

The RM1000x is 80 PLUS Gold certified, and given our experience with the platform, we expect high efficiency levels closer to Platinum than Gold. This PSU is also Haswell ready since it uses DC-DC converters for the generation of its minor rails. It is also rated at up to 50°C where older RM units are rated at up to 40°C.

We noticed that Corsair lists OCP (Over Current Protection) as a protection feature even though the PSU only has a single +12V rail. Corsair probably lists OCP since the minor rails are still covered by the feature. The FDB fan of the RM1000i has been replaced with a rifle-bearing fan, the NR135L Corsair now uses in many of its PSUs. It is a silent fan of good quality that will last for a very long time. However, it won't last as long as an FDB fan, but given this PSU's semi-passive operation, it won't be utilized as much, either.

At 18 cm, the PSU is rather long, but most cases will accommodate it without any compatibility issues. The seven year warranty Corsair provides clearly shows that this is a highly reliable product, and its asking price is fair price given the features and technical specifications.


The single +12V rail is powerful since it can deliver up to 83.3 amperes, while the minor rails are strong as well, with 150 W maximum power output combined. The 5VSB rail could be a little stronger since we are talking about a 1 kW PSU; however, the 3 amperes on this rail should be enough.

Cables & Connectors, Power Distribution

Corsair equipped the RM1000x with a lot of cables and connectors, including eight PCIe and two EPS connectors that are available at the same time. There are also twelve SATA and eleven peripheral connectors, which will power a ton of drives and peripheral devices. Corsair states that Type 4 cables are used with the unit, the same cables as for the RM1000i. These have additional capacitors on their PCIe and EPS cables for improved ripple suppression and four more pins on the 24-pin ATX connector for sense wires that improve load regulation. We should note here that even the high-end HXi line and older RM units use Type 3 cables that lack the filtering capacitors and additional wires on the 24-pin connector. The 24-pin ATX and PCIe connectors use 16AWG wires, the FDD adapter utilizes 22AWG gauges, and all other connectors use 18AWG wires.

We do not have anything to talk about when it comes to the PSU's power distribution since this PSU doesn't features multiple +12 V rails.