Corsair RM1000x 1000W 80 Plus Gold Modular PSU: features, specs and fit

The Corsair RM1000x (model CP-9020094-NA) is a 1000W ATX power supply for desktop PCs. It is part of Corsair's RMx series, which the brand describes as combining tight voltage control, quiet operation, Gold-certified efficiency and a fully modular cable set. It is aimed at high-performance builds where a stable supply matters.

What 80 PLUS Gold tells you

80 PLUS is a certification for efficiency. A Gold-rated unit typically converts at least about 87 to 90 percent of the power it draws from the wall into usable DC power at typical loads, depending on the load level. Corsair says this means less excess heat. Less wasted energy as heat also tends to mean the fan has less to do.

Zero RPM fan mode

Corsair says Zero RPM mode keeps the fan stopped at low and medium loads for virtually silent operation. The fan starts when the load or temperature rises. For a PC that spends most of its time browsing or idle, that can mean no fan noise from the supply for long stretches.

Fully modular cables

"Fully modular" means every cable, including the main motherboard connector, plugs into the supply instead of being fixed to it. You connect only what the build needs, which usually gives a tidier case and better airflow. Corsair says this also makes upgrades easier. The listing mentions 11 SATA connectors.

Components and standards

Corsair says the supply uses all Japanese 105°C capacitors, and describes them as supporting solid power delivery and long-term reliability. It follows ATX12V v2.4 and EPS 2.92 standards and is described as backward compatible with ATX12V 2.2, 2.31 and 2.01 systems. The listing also says it is ready for 6th generation Intel Core processors on Skylake and Z170 motherboards. A ten-year warranty is listed.

Size

The unit measures about 7.1 x 3.4 x 5.9 inches (18 x 8.6 x 15 cm). That is a standard ATX supply footprint, though case layouts differ.

Who it suits

It suits builders with a power-hungry setup, such as a high-end graphics card, several drives, or a workstation, who want headroom and a clean cable layout. For a modest PC, a lower-wattage supply is often enough.

What to check before you buy

• Wattage: add up the maximum power of your components, and check the graphics card maker's recommended supply.
• GPU connectors: this listing does not describe newer 12VHPWR or 12V-2x6 connectors, so confirm your graphics card's power connection.
• Case fit: check that your case takes a standard ATX supply of this length.
• Cables: modular cables from different models are generally not interchangeable, so use the ones that come with this unit.
• Connector counts: confirm the number of SATA, PCIe and CPU connectors suits your build.
• Safety: follow the manual and local rules when installing.

The short version

• A 1000W fully modular ATX power supply from Corsair's RMx series.
• 80 PLUS Gold efficiency and Zero RPM fan mode.
• Japanese 105°C capacitors, 11 SATA connectors and a ten-year warranty, as listed.
• Meets ATX12V v2.4 and EPS 2.92 and is backward compatible with earlier ATX12V versions.
• About 7.1 x 3.4 x 5.9 inches.

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