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CORSAIR RM1000e (2025) vs CORSAIR RM850x (2024)

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Product A: CORSAIR

RM1000e (2025)

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B

Product B: CORSAIR

RM850x (2024)

52 of 66 known

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Only differences

ACORSAIR RM1000e (2025)

BCORSAIR RM850x (2024)

General

5 of 12 differ

Series

RMe1Maker product pagecorsair.com/us/en/p/psu/cp-9020297-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-cp-9020297-naRead 14 October 2026Page title: RMe Series RM1000e.

RMx1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026

Model numbersiMaker identifiers for this exact model and its listed variants. Excludes sibling models and other generations.

CP-9020297-NA, CP-9020294-NA, CP-9020297-EU1Maker product pagecorsair.com/us/en/p/psu/cp-9020297-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-cp-9020297-naRead 14 October 20262Maker product pagecorsair.com/us/en/p/psu/cp-9020294-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-white-cp-9020294-naRead 14 October 2026SKU CP-9020294-NA.8Retailer pagekomputronik.pl/product/957638/zasilacz-pc-corsair-rm1000e-2025-rme-series-cp-9020297-eu.htmlRead 14 October 2026CP-9020297-EU on the Komputronik and OX.ee listings.

CP-9020270-NA, CP-9020270-EU, CP-9020270-UK1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026SKU CP-9020270-NA. The EU and UK units are CP-9020270-EU and CP-9020270-UK, listed on Corsair's German page and by UK retailers with the same Tech Specs. The Japan unit is CP-9020270-JP and is not stored.10Retailer pagescan.co.uk/products/850w-corsair-rmx-series-rm850x-black-fully-modular-cybenetics-gold-pcie-51-single-rail-140mm-fan-atxRead 14 October 2026Scan lists CP-9020270-UK.

GTIN / EAN

8400066913278Retailer pagekomputronik.pl/product/957638/zasilacz-pc-corsair-rm1000e-2025-rme-series-cp-9020297-eu.htmlRead 14 October 2026Komputronik lists producer code CP-9020297-EU with EAN 840006691327. OX.ee lists the same code with EAN 0840006691327. This is the only GTIN found for the RMe 2025 RM1000e. The NA code was not found in a reliable listing.9Retailer pageox.ee/en/product/2885880Read 14 October 2026EAN 840006691327 (also printed as 0840006691327) for CP-9020297-EU.

840006667506, 840006667445, 8400066675448Spec databasecomparateur-gamer.fr/prix/corsair-rm850x-2024-840006667445Read 14 October 2026EAN 840006667445 with reference CP-9020270-EU.9Retailer pageebay.com/p/22074154707Read 14 October 2026eBay product page for CP-9020270-NA shows UPC 0840006667506. This is the only source for the NA code. The check digit is valid.10Retailer pagescan.co.uk/products/850w-corsair-rmx-series-rm850x-black-fully-modular-cybenetics-gold-pcie-51-single-rail-140mm-fan-atxRead 14 October 2026Scan lists manufacturer code CP-9020270-UK with GTIN 840006667544.

AnnouncediThe maker's first announcement of this model. This is separate from first retail availability.

Not available

10 September 20244Press releasecorsair.com/newsroom/press-release/corsair-updates-popular-rmx-series-low-noise-power-supplies-with-atx-3-1-compliance-and-native-atx-12v-2x6-connectorRead 14 October 2026Press release dated September 10, 2024.

Status

Available1Maker product pagecorsair.com/us/en/p/psu/cp-9020297-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-cp-9020297-naRead 14 October 2026In stock on the Corsair US store in October 2026 with a Best Seller tag.

Available1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Page shows the product in stock.

PredecessoriThe model this one directly replaced, in the same line, tier and size, as the maker or a trusted review names it.

Not available

Not available

SuccessoriThe model that directly replaced this one, in the same line, tier and size. A revision such as a Slim or OLED model does not count when a next generation exists.

Not available

Not available

Launch price (US)iThe maker's US launch MSRP for the stated configuration, excluding tax. Current store prices and later discounts do not qualify.

$169.994Maker product pageweb.archive.org/web/20250124130712/https://www.corsair.com/us/en/p/psu/cp-9020297-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-cp-9020297-naRead 14 October 2026Archived copy of the Corsair US page from 2025-01-24, marked New, a few days after the reviews of January 15 and 22. It shows a price of 169.99 USD, excluding sales tax. Hardware Busters and Tom's Hardware print 170 USD. The page today shows 189.99 USD, which is a later price. The archived page shows the black SKU CP-9020297-NA. The white edition's launch price is not stated.6Reviewhwbusters.com/psus/corsair-rm1000e-atx-v3-1-psu-reviewRead 14 October 2026Technical specifications: MSRP (excluding VAT) 170 USD. Review published January 15, 2025.7Reviewtomshardware.com/pc-components/power-supplies/corsair-rm1000e-atx-3-1-power-supply-reviewRead 14 October 2026Review published 14 May 2025 says it was priced at 170 USD at the time of the review. Used only as support for the Corsair page figure.

$149.993Maker product pageweb.archive.org/web/20240913090852/https://www.corsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Archived copy of the Corsair US page from 2024-09-13, three days after launch. It shows a regular price of 149.99 USD with no discount, excluding sales tax. Hardware Busters gives an MSRP of 150 USD excluding VAT. TweakTown prints 169.99 USD, which is the later list price on Corsair's page today.6Reviewhwbusters.com/psus/corsair-rm850x-atx-v3-1-psu-reviewRead 14 October 2026Technical specifications: MSRP (excluding VAT) 150 USD. Review published September 14, 2024.

Launch price (EU)iThe maker's euro launch price for the stated configuration, including VAT as published. Current store prices and later discounts do not qualify.

Not available

Not available

MarketsiISO country or region codes where this exact model or variant is sold. A source page's language does not establish availability.

Not available

Not available

ColoursiThe maker's own colour names

Black, White1Maker product pagecorsair.com/us/en/p/psu/cp-9020297-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-cp-9020297-naRead 14 October 20262Maker product pagecorsair.com/us/en/p/psu/cp-9020294-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-white-cp-9020294-naRead 14 October 2026The white edition has SKU CP-9020294-NA, the same Tech Specs and the same power table.

Not available

Form factoriThe physical size standard that decides what fits in the case. An ATX unit is 150 × 86 mm at the back. An SFX unit is 125 × 63.5 mm.

ATX1Maker product pagecorsair.com/us/en/p/psu/cp-9020297-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-cp-9020297-naRead 14 October 20266Reviewhwbusters.com/psus/corsair-rm1000e-atx-v3-1-psu-reviewRead 14 October 2026Dimensions 150 x 85 x 140 mm (W x H x D). The back face is the ATX size.

ATX1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Tech Specs: Dimensions 160x150x86. The back face is 150 x 86 mm, the standard ATX size.

ATX versioniThe ATX12V design guide revision the maker claims compliance with. A 16-pin GPU cable alone does not establish ATX 3.x. A Cybenetics report that withholds its ATX badge does not change the maker's claim. It goes in the source note.

ATX 3.11Maker product pagecorsair.com/us/en/p/psu/cp-9020297-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-cp-9020297-naRead 14 October 2026

ATX 3.11Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Tech Specs: ATX12V Version 3.1.

PCIe CEM versioniThe PCI Express card power revision the maker claims, as printed next to the ATX version. It sets the GPU power connector rules. It is not a slot speed. A reviewer's statement is not enough.

PCIe 5.11Maker product pagecorsair.com/us/en/p/psu/cp-9020297-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-cp-9020297-naRead 14 October 2026Page says PCIe 5.1 compatible.

PCIe 5.11Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Feature list: ATX 3.1 compliant, supporting PCIe 5.1.

Modular cablesiFull means every cable detaches. Semi means some cables are fixed, usually the 24-pin and CPU cables.

Fully modular1Maker product pagecorsair.com/us/en/p/psu/cp-9020297-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-cp-9020297-naRead 14 October 20265Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026DUT Information: Cable Design Fully Modular.

Fully modular1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026

Built by (OEM)iThe company that designed and built the unit for the brand, such as CWT or FSP. As named by the maker, a teardown review or a Cybenetics report.

HEC5Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026DUT Information: OEM/ODM HEC. Parts description: Manufacturer (OEM) HEC.7Reviewtomshardware.com/pc-components/power-supplies/corsair-rm1000e-atx-3-1-power-supply-reviewRead 14 October 2026Internal Design: HEC (Compucase) is the OEM.

Channel Well Technology (CWT)5Measurementcybenetics.com/evaluations/psus/2399Read 14 October 2026DUT Information: OEM/ODM Channel Well Technology. Parts description: Manufacturer (OEM) CWT.6Reviewhwbusters.com/psus/corsair-rm850x-atx-v3-1-psu-reviewRead 14 October 2026Technical specifications: OEM Channel Well Technology (CWT).

Power

4 of 9 differ

Rated continuous poweriThe continuous DC output the maker rates the unit for, such as 850. Peak or power excursion figures are not stored here.

1,000W1Maker product pagecorsair.com/us/en/p/psu/cp-9020297-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-cp-9020297-naRead 14 October 20265Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026Manufacturer-provided information: Rated Power 1000 W.

850W1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Tech Specs: Continuous Power W 850 Watts.

Full power rated up toiThe ambient temperature up to which the maker rates full continuous power, such as 50 °C. A review table that prints 0-50 °C with no maker source is not enough. An operating temperature range that does not say full power is not enough. A maker table with load steps gives the full-load row, such as 40 °C at full load next to 50 °C at 80 percent load. A temperature that a Cybenetics report marks as manufacturer-provided counts as a maker statement.

Not available

50°C1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Overview: 50 C continuous operating temperature. The press release rates the power output at a 50 C ambient temperature.4Press releasecorsair.com/newsroom/press-release/corsair-updates-popular-rmx-series-low-noise-power-supplies-with-atx-3-1-compliance-and-native-atx-12v-2x6-connectorRead 14 October 2026Rated power output at a 50 C ambient temperature.

12V rail designiHow the maker splits +12V over-current protection. Switchable means the user picks single or multi rail with a switch or in software.

Single rail6Reviewhwbusters.com/psus/corsair-rm1000e-atx-v3-1-psu-reviewRead 14 October 2026Technical specifications: Number of 12V rails 1.

Single rail6Reviewhwbusters.com/psus/corsair-rm850x-atx-v3-1-psu-reviewRead 14 October 2026Technical specifications: 12V combined 850W on 1 12V rail.

+12V max currentiHighest combined current on +12V from the maker's power table. For a multi-rail unit this is the combined total, not one rail.

83.3A3Owner's manualcorsair.com/explorer/diy-builder/power-supply-units/corsair-rme-series-2025Read 14 October 2026RM1000e Specifications table: model RPS0217, SKU CP-9020297/CP-9020294, +12V 83.3A, 1000W. The black product page prints 62.5A, which is the RM750e figure. The white page prints 83.3A.5Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026Power specifications table: +12V 83.3 A, 1000 W.

70.8A1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Power table: +12V 70.8A, 849.6W, model RPS0197, part no. 75-005876.2Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-rmx-seriesRead 14 October 2026RM850x power table: +12V 70.8A, 849.6W, model RPS0197.

+12V max poweriHighest combined power on +12V from the maker's power table.

1,000W3Owner's manualcorsair.com/explorer/diy-builder/power-supply-units/corsair-rme-series-2025Read 14 October 2026RM1000e Specifications table: +12V 83.3A 1000W, total power 1000W.5Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026Power specifications table: +12V 1000 W, total 1000 W.

849.6W1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Power table: +12V 70.8A, 849.6W.2Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-rmx-seriesRead 14 October 2026RM850x power table: +12V 70.8A, 849.6W.

+3.3V and +5V combined poweriThe combined limit for the +3.3V and +5V rails from the maker's power table. A table that prints the same figure under both rails, as be quiet! does, shows one shared limit, so the figure is stored once and not added.

150W1Maker product pagecorsair.com/us/en/p/psu/cp-9020297-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-cp-9020297-naRead 14 October 2026Power table lists +3.3V 20A and +5V 20A with 150W combined. Cybenetics, Hardware Busters and Tom's Hardware also say 150W.5Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026Power specifications table: 3.3V and 5V 20 A each, 150 W combined.

150W1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Power table: +3.3V 20A and +5V 20A with one 150W cell.2Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-rmx-seriesRead 14 October 2026RM850x power table: +3.3V 20A and +5V 20A, 150W.

+5V standby currentiHighest current on the +5VSB standby rail. It powers USB charging and wake functions while the PC is off.

3A1Maker product pagecorsair.com/us/en/p/psu/cp-9020297-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-cp-9020297-naRead 14 October 20265Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026Power specifications table: 5VSB 3 A, 15 W.

3A1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Power table: +5VSB 3A, 15W.2Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-rmx-seriesRead 14 October 2026RM850x power table: +5Vsb 3A, 15W.

AC input voltageiThe rated AC input range, such as 100 to 240 V.

Lowest100Highest240V1Maker product pagecorsair.com/us/en/p/psu/cp-9020297-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-cp-9020297-naRead 14 October 2026AC input 100-240V, 47-63Hz.5Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026Manufacturer-provided information: rated voltage 100-240 Vrms, 6-12 A, 47-63 Hz.

Lowest100Highest240V1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Power table: AC input 100-240V, input current 10A-5A, 47-63Hz.2Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-rmx-seriesRead 14 October 2026Power table: AC input rating 100V-240V, input current 10A-5A, 47Hz-63Hz.

Alternative low power mode (ALPM)iThe maker or a Cybenetics report states support for the ATX alternative low power mode used by Modern Standby.

Yes5Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026Temperature and Compliance Info: ALPM (Alternative Low Power Mode) compatible, checked.

Yes1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Tech Specs: Modern Standby Yes. The Cybenetics report ticks ALPM compatible.5Measurementcybenetics.com/evaluations/psus/2399Read 14 October 2026Temperature and Compliance Info: ALPM (Alternative Low Power Mode) compatible, checked.

Certifications

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80 PLUS ratingiThe 80 PLUS level. When the 80 PLUS listing or certificate and the maker claim differ, store the listing level and put the claim and test voltage in the source note. When a model has several 80 PLUS entries, such as a newer test at a higher level, use the newest entry that matches the current maker documents.

Not available

Not available

Cybenetics efficiency at 115ViThe Cybenetics ETA level from the 115V test. The Cybenetics report wins over the maker's claim.

Cybenetics Platinum5Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026Report 24PS2624A, certification ID 252624, issued Nov 1, 2024. The model name in the database is RM1000e (ATX v3.1). ETA Platinum at 115V (badge image). The maker page says Cybenetics Gold, and Hardware Busters says Corsair chose Gold badges for the whole RMe line. The archived Corsair page of January 2025 said Platinum. The report note says the results apply to both the black and white variants.

Cybenetics Gold5Measurementcybenetics.com/evaluations/psus/2399Read 14 October 2026Report 24PS2399A, certification ID 252399, issued Apr 1, 2024. The ETA badge shows Gold at 115V. The model name is RM850x (ATX v3.1). Corsair also says Cybenetics Gold without a voltage.

Cybenetics efficiency at 230ViThe Cybenetics ETA level from the 230V test. The 230V thresholds are higher, so the level can differ from the 115V level. The Cybenetics report wins over the maker's claim.

Cybenetics Platinum5Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026ETA Platinum at 230V (badge image).

Cybenetics Gold5Measurementcybenetics.com/evaluations/psus/2399Read 14 October 2026The ETA badge shows Gold at 230V.

Cybenetics noise at 115ViThe Cybenetics LAMBDA level from the 115V test. A++ is the quietest. The Cybenetics report wins over the maker's claim.

A-5Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026LAMBDA A- at 115V (badge image). The maker page also says Cybenetics Noise A-.

A1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Tech Specs: Cybenetics Noise A, with no input voltage. The Cybenetics report shows A at both voltages. The launch press release says A+, which the report does not show.5Measurementcybenetics.com/evaluations/psus/2399Read 14 October 2026The LAMBDA badge shows A at 115V.

Cybenetics noise at 230ViThe Cybenetics LAMBDA level from the 230V test. The Cybenetics report wins over the maker's claim.

A-5Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026LAMBDA A- at 230V (badge image).

A1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Tech Specs: Cybenetics Noise A, with no input voltage. The Cybenetics report shows A at both voltages.5Measurementcybenetics.com/evaluations/psus/2399Read 14 October 2026The LAMBDA badge shows A at 230V.

Measured

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Average efficiency at 115V (measured)iAverage efficiency over the whole load range at 115V input, from more than 1450 load combinations in the Cybenetics method. It is not the peak efficiency or the efficiency at 50% load.

89.483%5Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026Average over more than 1450 load combinations at 115V. Tested Oct 31, 2024 on sample serial A9DAF4420003AV. Ambient 28-32 C.

88.815%5Measurementcybenetics.com/evaluations/psus/2399Read 14 October 2026Average over more than 1450 load combinations at 115V. Tested Mar 29, 2024 on sample serial A6GGA404K007EE, received Mar 14, 2024. Ambient 28-32 C. DUT note: CP-9020270 (Semi-Passive Off).

Average efficiency at 230V (measured)iThe same average efficiency at 230V input.

91.576%5Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026Average over more than 1450 load combinations at 230V.

90.944%5Measurementcybenetics.com/evaluations/psus/2399Read 14 October 2026Average over more than 1450 load combinations at 230V.

Light-load efficiency at 115V (measured)iEfficiency at a 10 W load for units up to 500 W, or at a 2% load for larger units, at 115V input. This is the ATX light-load test.

70.962%5Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026Efficiency at 2% load (more than 500 W unit) at 115V.

75.825%5Measurementcybenetics.com/evaluations/psus/2399Read 14 October 2026Efficiency at 2% load (more than 500 W unit) at 115V.

Average power factor at 115V (measured)iAverage power factor over the whole load range at 115V input. 1 is the best possible value.

0.9755Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026Average over more than 1450 load combinations at 115V.

0.995Measurementcybenetics.com/evaluations/psus/2399Read 14 October 2026Average over more than 1450 load combinations at 115V.

Average noise at 115V (measured)iAverage noise over the whole load range at 115V input in the Cybenetics method, at about 30 °C ambient. It is not the noise at full load.

25.54dB(A)5Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026Average over more than 1450 load combinations at 115V. Ambient 28-32 C. Bruel and Kjaer 2270 G4 sound analyzer. The 230V average is 25.32 dBA.

21.34dB(A)5Measurementcybenetics.com/evaluations/psus/2399Read 14 October 2026Average over more than 1450 load combinations at 115V. Ambient 28-32 C. Bruel and Kjaer 2270 G4 sound analyzer. The DUT note says semi-passive off, but the typical load table shows the fan at 0 rpm from 10% to 50% load, so the report does not make clear whether the fan ran in every part of the average. The 230V average is 21.37 dBA.

Noise at full load at 115V (measured)iNoise at 100% load at 115V input in the Cybenetics typical load tests. That row often runs at about 45 °C intake. The intake temperature and the fan speed go in the source note. Lower is better.

46.7dB(A)5Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026Typical load tests at 115V, 100% load row: 46.7 dB(A) at 2094 rpm fan speed, ambient about 30 C.

30.8dB(A)5Measurementcybenetics.com/evaluations/psus/2399Read 14 October 2026Typical load tests at 115V, 100% load row: 30.8 dB(A) at 986 rpm fan speed, ambient about 30 C. At 230V it is also 30.8 dB(A) at 986 rpm.

Standby power with no load at 115V (measured)iPower the unit draws from the wall with the PC off and nothing drawn from +5VSB, at 115V input.

0.0481W5Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026Standby power consumption at 115V with no load on +5VSB.

0.0179W5Measurementcybenetics.com/evaluations/psus/2399Read 14 October 2026Standby power consumption at 115V with no load on +5VSB.

Hold-up time (measured)iHow long the outputs stay in regulation after AC power is lost, at maximum continuous load, as printed in the Cybenetics report. The report names no input voltage. The AC loss to PWR_OK time goes in the source note. Higher is better.

16.4ms5Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026Hold-Up Time and PWR_OK Signal: hold-up time 16.4 ms, AC loss to PWR_OK 13.8 ms, at maximum continuous load. Report 2624.

25ms5Measurementcybenetics.com/evaluations/psus/2399Read 14 October 2026Hold-Up Time and PWR_OK Signal: hold-up time 25.00 ms, AC loss to PWR_OK 21.30 ms, PWR_OK inactive to DC loss 3.70 ms, at maximum continuous load. The report names no input voltage.

12V ripple at full load (measured)iPeak-to-peak ripple on the +12V rail at full load and 115V input. Lower is better.

30.07mV5Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026Non-accredited measurement. 12V ripple at full load at 115V. At 230V it is 31.31 mV.

24.2mV5Measurementcybenetics.com/evaluations/psus/2399Read 14 October 2026Non-accredited measurement. 12V ripple at full load at 115V. At 230V it is 25.82 mV.

12V load regulation (measured)iHow far the +12V voltage moves between light and full load at 115V input. Lower is better.

0.81%5Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026Non-accredited measurement. 12V load regulation at 115V. The 230V figure is also 0.81%.

0.63%5Measurementcybenetics.com/evaluations/psus/2399Read 14 October 2026Non-accredited measurement. 12V load regulation at 115V. At 230V it is 0.64%.

Cables and connectors

4 of 7 differ

CablesiOne row per kind of cable that runs from the PSU to a device. Connector is the plug at the device end. Count is the number of those plugs over all cables in the row. Length runs from the PSU end to the first plug. Adapters that plug into other cables are left out. Use 16-pin PCIe when the maker names a 16-pin GPU cable without saying 12V-2x6 or 12VHPWR. A cable from a 12V-2x6 socket on the PSU to 8-pin plugs is a cable, not an adapter, and counts as PCIe 8-pin. When the maker's documents name one GPU cable both 12VHPWR and 12V-2x6, use 16-pin PCIe and name both in the source note. Cables of one connector kind with different lengths or wire gauges get one row each.

ACORSAIR RM1000e (2025)

Connector	Connectors	Cables	Length to first plug (mm)	Wire gauge	Rated power (W)
ATX 24-pin (20+4)	1	1	610	16-20AWG	Not available
CPU 8-pin (EPS, 4+4)	2	2	750	18AWG	Not available
PCIe 8-pin (6+2)	4	3	650	16-18AWG	Not available
12V-2x6	1	1	650	16AWG	600
SATA power	6	2	450	18AWG	Not available
4-pin Molex	2	1	450	18AWG	Not available

Source1Maker product pagecorsair.com/us/en/p/psu/cp-9020297-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-cp-9020297-naRead 14 October 2026Cable listing table: lengths 610 mm (24-pin), 750 mm (EPS), 650 mm (12V-2x6, 12V-2x6 to dual 8-pin, PCIe 8-pin), SATA 450 mm to the first plug then 100 mm spacing. Tolerance 10 mm. PCIe 8-pin is 2 single cables plus 1 cable with two 8-pin plugs (the 12V-2x6 to dual 8-pin cable), so 4 plugs on 3 cables. The SATA row covers a 4-plug SATA cable and a 2 SATA and 2 PATA cable. The two 4-pin plugs sit on the SATA and PATA cable, so the molex row takes that cable's 450 mm to its first plug. Hardware Busters and Cybenetics list the same cables. Tom's Hardware lists 3 PCIe 8-pin, 8 SATA and 3 Molex, which does not match Corsair or Cybenetics and is not used. The dual 8-pin cable and the native 12V-2x6 cable are separate cables in the box. Whether both can be used at once is not stated.5Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026Cables and Connectors table gives wire gauge per cable: ATX 16-20AWG, EPS 18AWG, 6+2 PCIe 16AWG, 2 x 6+2 PCIe 16-18AWG, 12+2 pin PCIe (600W) 16-24AWG, SATA and Molex 18AWG. The 16-24AWG range for the 12V-2x6 cable includes the thin sideband wires, so the 16AWG power wire gauge is stored. The report lists lengths of 600 mm, 740 mm and 640 mm, which are mostly 10 mm shorter than Corsair's figures (the 12+2 pin cable is 650 mm in both). Corsair's lengths are stored.6Reviewhwbusters.com/psus/corsair-rm1000e-atx-v3-1-psu-reviewRead 14 October 2026Technical specifications: 2x EPS (2 cables), 4x PCIe 6+2 pin (3 cables), 1x PCIe 12+2 pin (600W), 6x SATA (2 cables), 2x 4-pin Molex (1 cable). Product photos page: nine sockets at the back, including a 12V-2x6.

BCORSAIR RM850x (2024)

Connector	Connectors	Cables	Length to first plug (mm)	Wire gauge	Rated power (W)
ATX 24-pin (20+4)	1	1	610	16-20AWG	Not available
CPU 8-pin (EPS, 4+4)	2	2	750	18AWG	Not available
PCIe 8-pin (6+2)	3	3	650	16-18AWG	Not available
12V-2x6	1	1	650	Not available	600
SATA power	8	2	505	18AWG	Not available
4-pin Molex	3	1	550	18AWG	Not available

Source1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Cable listing: 1 ATX 24-pin 610 mm, 2 EPS 8-pin (4+4) 750 mm, 1 PCIe 12V-2x6 (12+4) 650 mm, 3 PCIe 8-pin (6+2) 650 mm, 2 SATA cables with 4 plugs each (505 mm to the first plug, 115 mm spacing, 850 mm total), 1 PATA cable with 3 plugs (550 mm to the first plug, 100 mm spacing, 750 mm total). All lengths have a tolerance of 10 mm, the PATA cable 25 mm. PATA plugs are the 4-pin Molex plugs. The page does not rate the 12V-2x6 cable. The Cybenetics report and Hardware Busters list it at 600 W. Gauges come from the Cybenetics report. The 16-24AWG range for the 12V-2x6 cable includes the thin sideband wires, so no gauge is stored for it. Cybenetics lists the SATA cable at 500 mm, which is not stored.2Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-rmx-seriesRead 14 October 2026Included cables: 1x ATX 24-pin 610 mm, 2x EPS 8-pin (4+4) 750 mm, 1x PCIe 12V-2x6 (12+4) 650 mm, 3x PCIe 8-pin (6+2) 650 mm, 2x SATA with 4 plugs 850 mm, 1x PATA with 3 plugs 750 mm.5Measurementcybenetics.com/evaluations/psus/2399Read 14 October 2026Cables and Connectors table: ATX 16-20AWG, EPS 18AWG, 6+2 pin PCIe 16-18AWG, 12+2 pin PCIe (600W) 16-24AWG, SATA 18AWG and Molex 18AWG, no in-cable capacitors. The 12V-2x6 cable is listed at 650 mm.

CPU (EPS) connectorsi8-pin or 4+4-pin CPU power plugs.

2=CalculatedFrom Cables

2=CalculatedFrom Cables

PCIe 8-pin connectorsi8-pin or 6+2-pin GPU power plugs. Counts the plugs in the box. Some cables share one PSU socket, which the source note says.

4=CalculatedFrom Cables

3=CalculatedFrom Cables

16-pin GPU connectorsiNative 16-pin GPU power plugs: 12V-2x6, 12VHPWR and 16-pin cables of unstated revision. Adapters are not counted. Counts the plugs in the box. Some cables share one PSU socket, which the source note says.

1=CalculatedFrom Cables

1=CalculatedFrom Cables

SATA power connectors

6=CalculatedFrom Cables

8=CalculatedFrom Cables

4-pin Molex connectors

2=CalculatedFrom Cables

3=CalculatedFrom Cables

Cable styleiHow the modular cables are made. Mixed means some cables are sleeved and others flat, such as a sleeved 24-pin cable with flat other cables. From the maker page or a review photo page.

Embossed or debossed flat1Maker product pagecorsair.com/us/en/p/psu/cp-9020297-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-cp-9020297-naRead 14 October 2026Page lists ultra-flexible embossed cables. The cable listing says Debossed for every cable. Tom's Hardware calls them individually sleeved, which Corsair does not.

Embossed or debossed flat1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Cable listing: Cable Type Embossed for every cable. The Tech Specs row says Type 4.4Press releasecorsair.com/newsroom/press-release/corsair-updates-popular-rmx-series-low-noise-power-supplies-with-atx-3-1-compliance-and-native-atx-12v-2x6-connectorRead 14 October 2026Fully modular, embossed, ultra-flexible cables.6Reviewhwbusters.com/psus/corsair-rm850x-atx-v3-1-psu-reviewRead 14 October 2026Cables page: all cables are embossed.

Fan

3 of 4 differ

Fan sizeiFrame size of the cooling fan, such as 120, 135 or 140.

120mm1Maker product pagecorsair.com/us/en/p/psu/cp-9020297-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-cp-9020297-naRead 14 October 20265Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026Cooling: 120mm Rifle Bearing Fan.

140mm1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Overview: 140mm low-noise fan.4Press releasecorsair.com/newsroom/press-release/corsair-updates-popular-rmx-series-low-noise-power-supplies-with-atx-3-1-compliance-and-native-atx-12v-2x6-connectorRead 14 October 2026140mm fan.5Measurementcybenetics.com/evaluations/psus/2399Read 14 October 2026Cooling: 140mm Fluid Dynamic Bearing Fan (NR140HP), 12V, 0.33A.

Fan bearingiUse the maker's bearing name. FDB and S-FDB are fluid dynamic. HDB is hydrodynamic. Noctua SSO and SSO2 are SSO. Corsair Magnetic Dome is magnetic dome. A brand bearing name that fits no option is Other.

Rifle1Maker product pagecorsair.com/us/en/p/psu/cp-9020297-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-cp-9020297-naRead 14 October 2026Page says 120mm rifle bearing fan. Cybenetics names it Hong Hua HA1225H12SF-Z.5Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026Cooling: 120mm Rifle Bearing Fan (HA1225H12SF-Z).

Fluid dynamic (FDB)1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Overview: a fluid dynamic bearing fan with magnetic dome structure. The Cybenetics report lists a Fluid Dynamic Bearing fan. The bearing is stored as fluid dynamic, since the maker names the dome as a structure of the fan and not as the bearing.4Press releasecorsair.com/newsroom/press-release/corsair-updates-popular-rmx-series-low-noise-power-supplies-with-atx-3-1-compliance-and-native-atx-12v-2x6-connectorRead 14 October 2026140mm fluid-dynamic bearing (FDB) fan.5Measurementcybenetics.com/evaluations/psus/2399Read 14 October 2026Cooling: Fluid Dynamic Bearing fan.

Fan modeiSemi-passive means the fan stops at low load, often sold as zero RPM, hybrid or 0 dB mode. Fanless means the unit has no fan.

Semi-passive1Maker product pagecorsair.com/us/en/p/psu/cp-9020297-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-cp-9020297-naRead 14 October 2026Tech Specs tab: Zero RPM Mode Yes.5Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026DUT Information: Semi-Passive Operation checked.

Semi-passive1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Tech Specs: Zero RPM Mode Yes. The fan is off at low to medium loads.5Measurementcybenetics.com/evaluations/psus/2399Read 14 October 2026Semi-Passive Operation checked and selectable.

Fan mode switchiA button, switch or software setting lets the user turn the semi-passive mode off so the fan always spins. A unit without a semi-passive mode, whose fan the maker says always spins, has no switch, so it is false.

No7Reviewtomshardware.com/pc-components/power-supplies/corsair-rm1000e-atx-3-1-power-supply-reviewRead 14 October 2026External Appearance: the RM1000e does not include a dedicated button for hybrid fan mode. It has Zero RPM Fan Mode.

Not available

Protection and parts

1 of 3 differ

ProtectionsiProtections the maker lists, or a retailer spec table copies from the maker, plus protections the Cybenetics protection tests show working (UVP, NLO, SIP). The Cybenetics manufacturer list has no OVP or UVP row, so do not build the list from it alone. A protection that is not listed may still exist. No-load covers no-load operation and no-load protection. Fan failure is a maker's fan failure protection or fan safeguard, also when the Cybenetics manufacturer block lists it.

Over-current (OCP), Over-voltage (OVP), Under-voltage (UVP), Over-power (OPP), Over-temperature (OTP), Short-circuit (SCP), No-load (NLO), Surge and inrush (SIP)3Owner's manualcorsair.com/explorer/diy-builder/power-supply-units/corsair-rme-series-2025Read 14 October 2026Safety and Protection section lists OVP, UVP, OCP, OTP, SCP and OPP. NLO and SIP come from the Cybenetics report.5Measurementcybenetics.com/evaluations/psus/2624Read 14 October 2026Protection Features (Manufacturer) lists OPP, +12V OCP, OTP, SCP, surge protection and inrush current protection. The protection tests tick NLO. Fan failure protection is not ticked.

Over-current (OCP), Over-voltage (OVP), Under-voltage (UVP), Over-power (OPP), Over-temperature (OTP), Short-circuit (SCP), No-load (NLO), Surge and inrush (SIP)2Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-rmx-seriesRead 14 October 2026Protections section: OVP and UVP on 12V, 5V and 3.3V, OCP on 3.3V, 5V and 12V, OTP, SCP and OPP. The six maker protections are stored together with NLO and SIP from the Cybenetics tests.6Reviewhwbusters.com/psus/corsair-rm850x-atx-v3-1-psu-reviewRead 14 October 2026Protection Features page, which presents the Cybenetics protection tests: OCP, OPP, OTP, SCP, NLO, fan failure protection and SIP (surge MOV, inrush NTC thermistor and bypass relay) all shown. The page has no OVP or UVP row.

All-Japanese capacitorsiThe maker states that every electrolytic capacitor is from a Japanese maker. A Japanese bulk capacitor alone is not enough. A spec row such as "Japanese capacitors" that names no exception counts.

Not available

Yes1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Overview: 100% industrial-grade, 105 C rated Japanese electrolytic capacitors.4Press releasecorsair.com/newsroom/press-release/corsair-updates-popular-rmx-series-low-noise-power-supplies-with-atx-3-1-compliance-and-native-atx-12v-2x6-connectorRead 14 October 2026100% Japanese electrolytic capacitors.

MTBF (claimed)iThe maker's mean time between failures, such as 100000. An MTTF figure for the whole unit counts too. An MTTF for the fan alone does not. The test temperature goes in the source note.

100,000h1Maker product pagecorsair.com/us/en/p/psu/cp-9020297-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-cp-9020297-naRead 14 October 2026Tech Specs tab: MTBF Hours 100,000 hours. The test temperature is not stated.

100,000h1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Tech Specs: MTBF Hours 100,000 hours. The test temperature is not stated.

Monitoring and lighting

None of 4 known

Software monitoringiThe unit reports power, temperature or fan data to PC software over a USB or internal connection.

Not available

Not available

SoftwareiThe maker's software for monitoring or control.

Not available

Not available

Built-in power displayiA screen on the unit that shows live power draw or other readings.

Not available

Not available

RGB lighting

Not available

Not available

Dimensions and weight

2 of 2 differ

DimensionsiBody without cables. Width and height are the back face with the AC inlet. Depth is the length into the case, which decides case fit.

Width150Height86Depth140mm(5.9 × 3.4 × 5.5 in)1Maker product pagecorsair.com/us/en/p/psu/cp-9020297-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-cp-9020297-naRead 14 October 2026Tech Specs tab: 140x150x86. The quick start guide gives 140 mm (L) x 150 mm (W) x 86 mm (H). Depth is 140 mm and the back face is 150 x 86 mm.3Owner's manualcorsair.com/explorer/diy-builder/power-supply-units/corsair-rme-series-2025Read 14 October 2026RM1000e Specifications: 140mm (L) x 150mm (W) x 86mm (H).

Width150Height86Depth160mm(5.9 × 3.4 × 6.3 in)1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Tech Specs: 160x150x86 with no unit. The manual gives length 160 mm, width 150 mm and height 86 mm. Depth is 160 mm.2Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-rmx-seriesRead 14 October 2026RM850x specifications: length 160 mm, width 150 mm, height 86 mm.

WeightiWeight of the unit alone. Use the Hardware Busters figure on hwbusters.com when the maker states none, not a copy on another site. Maker weights that include cables or the box, such as Corsair's, and retailer packed weights are not stored. A net weight counts unless the maker says it includes the cables.

1.65kg(3.6 lb)6Reviewhwbusters.com/psus/corsair-rm1000e-atx-v3-1-psu-reviewRead 14 October 2026Technical specifications: 1.65 kg (3.64 lb). The review does not say whether cables are included. Corsair's 3 kg figure is most likely a packed weight, so it is not stored.

1.79kg(3.9 lb)6Reviewhwbusters.com/psus/corsair-rm850x-atx-v3-1-psu-reviewRead 14 October 2026Technical specifications: 1.79 kg (3.95 lb). Corsair's 3 kg figure is not stored, since it is most likely a packed weight.7Reviewigorslab.de/en/corsair-rm850x-atx-v3-1-power-supply-2024-testRead 14 October 2026Igor's Lab copy of the Hardware Busters review, published November 6, 2024. It lists 1.79 kg and 150 x 85 x 160 mm. The maker's 86 mm height is stored.

In the box

1 of 1 differ

In the boxiItems supplied with this exact model, verbatim. The AC power cord differs per region.

Power Supply, AC Cable, DC Cables, Cable Ties, Mounting Screws, Safety Leaflet3Owner's manualcorsair.com/explorer/diy-builder/power-supply-units/corsair-rme-series-2025Read 14 October 2026RM1000e Specifications, Package Contents.

Not available

Links

Not compared

Product page

www.corsair.com/us/en/p/psu/cp-9020297-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-cp-9020297-na1Maker product pagecorsair.com/us/en/p/psu/cp-9020297-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-cp-9020297-naRead 14 October 2026

www.corsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-na1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026

Spec sheet

Not available

Not available

Manual

www.corsair.com/explorer/diy-builder/power-supply-units/corsair-rme-series-20253Owner's manualcorsair.com/explorer/diy-builder/power-supply-units/corsair-rme-series-2025Read 14 October 2026

www.corsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-rmx-series2Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-rmx-seriesRead 14 October 2026

EPREL registration numberiId in the EU energy label database. Each size or model of a series has its own id, so it is per variant.

Not available

Not available

Warranty

1 of 1 differ

Manufacturer warranty (source market)iThe maker's warranty period for the exact SKU or configuration and market named in the source note. It applies only to that stated market, not every regional variant. Statutory consumer rights are excluded. The base term is stored. An extension that needs registration goes in the source note.

7years1Maker product pagecorsair.com/us/en/p/psu/cp-9020297-na/rme-series-rm1000e-fully-modular-low-noise-atx-power-supply-cp-9020297-naRead 14 October 2026Tech Specs tab: Warranty 7 Year. The page is corsair.com US, so the market is US.

10years1Maker product pagecorsair.com/us/en/p/psu/cp-9020270-na/rmx-series-rm850x-fully-modular-power-supply-cp-9020270-naRead 14 October 2026Tech Specs: Warranty 10 Year. The page is corsair.com US, so the market is US.

Both are also in the API. Back to all power supplies.