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Corsair RMX Series (2018), RM1000x, 1000 Watt, 80+ Gold Certified, Fully Modular Power Supply (CP-9020094-NA)
Corsair

Corsair RMX Series (2018), RM1000x, 1000 Watt, 80+ Gold Certified, Fully Modular Power Supply (CP-9020094-NA)

Bottom line: The Corsair RMX Series ($234.99 on Amazon as of 2026-10-07): 80 PLUS Gold certified for lower waste heat and running cost; main trade-off: 1000W is overkill for single-GPU mid-range builds.

$234.99

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Buy on Amazon — $234.99 Compare to similar power supplies

By , Founder & Editor-in-Chief · Listing data updated

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides.

*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.

Pros & Cons

Pros

  • ✓ 80 PLUS Gold certified for lower waste heat and running cost
  • ✓ 100% Japanese 105C capacitors throughout the internal design
  • ✓ Zero RPM Fan Mode keeps the fan stopped at low/medium loads
  • ✓ Ten-year warranty spans several system builds
  • ✓ Eleven SATA connectors for drive-heavy builds

Cons

  • ✗ 1000W is overkill for single-GPU mid-range builds
  • ✗ 2018 RMx revision predates ATX 3.x and 12VHPWR native cabling
  • ✗ Zero RPM mode means no fan feedback to confirm the unit is live
  • ✗ Fully modular cables are Corsair-specific, not cross-brand safe

Manufacturer description

Corsair's RM1000x delivers 1000W of continuous power with 80 PLUS Gold certification, making it a fit for high-draw builds running a flagship GPU alongside an overclocked CPU. Gold-level efficiency means less waste heat inside your chassis and lower running costs over the life of the build. The internal design uses 100% Japanese 105C capacitors, the component choice that separates long-haul reliability from units that sag after a couple of years, and Corsair backs that with a ten-year warranty covering several system generations. Zero RPM Fan Mode keeps the fan completely stopped at low and…

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SpecPicks Verdict

SpecPicks scored Corsair RMX Series using a rating × review-volume × price-fit model applied to published specs and reviews across the power supplies category. Corsair's power supplies lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for power supplies of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

Is the Corsair RM1000x powerful enough for an RTX 4090 or 5090 build?

At 1000W continuous with 80 PLUS Gold efficiency, it sits at or above the wattage most flagship single-GPU builds call for. Check your specific GPU's recommended PSU wattage and transient spec on the card's listing before committing.

How long is the warranty on the RM1000x?

Corsair covers this unit with a ten-year warranty, which the manufacturer positions as lasting across several system builds. Register the unit and keep proof of purchase; check the product listing for current terms.

Does the fan run all the time?

No. Zero RPM Fan Mode keeps the fan fully stopped at low and medium loads, so the unit is virtually silent during desktop use and only spins up as load climbs.

Is this power supply fully modular?

Yes, all DC cables detach. You install only the cables your build needs, which reduces clutter behind the motherboard tray and makes later upgrades easier.

Which motherboard and ATX standards does it support?

It meets ATX12V v2.4 and EPS 2.92, is 6th-gen Intel Core (Skylake and Z170) ready, and stays backward compatible with ATX12V 2.2, 2.31, and 2.01 systems.

Key Features

  • 80 PLUS Gold certified: High efficiency operation for less excess heat and lower operating costs
  • 100% All Japanese 105 capacitors: Premium internal components ensure solid power delivery and long term reliability
  • Zero RPM Fan Mode: Virtually silent operation at low and medium loads. 6th generation Intel Core processor Ready (Intel Skylake and Z170 motherboards)ATX12V v2.4 and EPS 2.92 standards and is backward compatible with ATX12V 2.2, 2.31 and ATX12V 2.01 systems
  • Fully Modular: Make your builds and upgrades easy, with clean, great-looking results
  • Ten year warranty: Your guarantee of reliable operation that will last across several system builds.SATA Connector:11

Full Specifications

BrandCorsair
Wattage1000 watts
Model Namermx
Form FactorATX12V
Model NumberCP-9020094-NA
Fully ModularMake your builds and upgrades easy, with clean, great-looking results
Built-In Mediarm1000x
Connector Typeconnector:11.,eps
Cooling MethodAir
Number of Fans1
Output Wattage1000
Item Dimensions7.08 x 3.38 x 5.9 inches
Mfr Part NumberCP-9020094-NA
Item Part NumberCP-9020094-NA
Ten year warrantyYour guarantee of reliable operation that will last across several system builds.SATA Connector:11
Compatible DevicesPersonal Computer
Power Supply DesignFull Modular
Warranty Description2 years
Maximum Input Voltage240 volts_of_alternating_current
Minimum Input Voltage100 volts_of_alternating_current

Ready to buy?

Corsair RMX Series (2018), RM1000x, 1000 Watt, 80+ Gold Certified, Fully Modular Power Supply (CP-9020094-NA) is listed on Amazon. Price, availability, shipping and returns are set by Amazon and its sellers — check the listing for current terms. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

Buy on Amazon — $234.99

*Price sourced from Amazon.com. Last updated 2026-10-07. Price and availability subject to change.

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Corsair RMX Series (2018), RM1000x, 1000 Watt, 80+ Gold Certified, Fully Modular Power Supply (CP-9020094-NA)
$234.99
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