Power supplies / Compare

Cooler Master MWE Gold 850 V3 vs CORSAIR RM1000x (2024)

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Product A: Cooler Master

MWE Gold 850 V3

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B

Product B: CORSAIR

RM1000x (2024)

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Only differences

ACooler Master MWE Gold 850 V3

BCORSAIR RM1000x (2024)

General

3 of 12 differ

Series

MWE Gold2Maker product pagecoolermaster.com/en-global/products/mwe-gold-850-v3-atx-3-1.htmlRead 15 October 2026Specification table: Series MWE Gold Series.

RMx1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-naRead 14 October 2026

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

MPX-8503-AFAG-2BUV, MPX-8503-AFAG-2EBEU1Maker product pagecoolermaster.com/en-us/products/mwe-gold-850-v3.htmlRead 15 October 2026Specification table: Model 850: MPX-8503-AFAG-2***. The Amazon US listing gives the full code MPX-8503-AFAG-2BUV.6Retailer pageamazon.com/Cooler-Master-Efficiency-Zero-RPM-Hexagonal/dp/B0D68VH8DRRead 15 October 2026US listing, ASIN B0D68VH8DR: Model Number and Mfr Part Number MPX-8503-AFAG-2BUV.7Retailer pageldlc.com/en/product/PB00697440.htmlRead 15 October 2026Listing model MPX-8503-AFAG-2EBEU. Arvutitark and heise.de list the same code for the GX II Gold 850W ATX 3.1.

CP-9020271-NA, CP-9020271-EU, CP-9020271-UK1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-naRead 14 October 2026SKU CP-9020271-NA. The EU and UK units are CP-9020271-EU and CP-9020271-UK, listed on Corsair's German and UK pages with the same Tech Specs. The Japan unit is CP-9020271-JP and is not stored.

GTIN / EAN

8841021192556Retailer pageamazon.com/Cooler-Master-Efficiency-Zero-RPM-Hexagonal/dp/B0D68VH8DRRead 15 October 2026UPC 884102119255 belongs to the US model MPX-8503-AFAG-2BUV.

840006667698, 8400066676368Spec databasebuildcores.com/products/PSU/4wctofbfr/Corsair-RM1000x-(2024)-Black-ATX-1000W-Fully-ModularRead 14 October 2026BuildCores lists UPC 840006667698 (EAN 0840006667698) for the Black RM1000x (2024) with part numbers CP-9020271-NA, -EU, -AU and -UK. The NA code comes from this one source.9Spec databasecomparateur-gamer.fr/prix/corsair-rm1000x-2024-840006667636Read 14 October 2026EAN 840006667636 with reference CP-9020271-EU.

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

Not available

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Status

Available1Maker product pagecoolermaster.com/en-us/products/mwe-gold-850-v3.htmlRead 15 October 2026October 2026: In Stock at USD 119.99, shipped from California. The price is a current store price and is not stored as a launch price.

Available1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-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.

Not available

Not available

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

Black7Retailer pageldlc.com/en/product/PB00697440.htmlRead 15 October 2026Colour Black. Heise.de prints Schwarz.

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.

ATX2Maker product pagecoolermaster.com/en-global/products/mwe-gold-850-v3-atx-3-1.htmlRead 15 October 2026Specification table: Form Factor ATX.

ATX1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-naRead 14 October 2026Dimensions 160x150x86 and the 'standard ATX dimensions' answer in the FAQ. The back face is 150 x 86 mm.

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 3.12Maker product pagecoolermaster.com/en-global/products/mwe-gold-850-v3-atx-3-1.htmlRead 15 October 2026Specification table: ATX Version ATX 12V Ver. 3.1. The title is MWE Gold 850 V3 ATX 3.1.

ATX 3.11Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-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 5.12Maker product pagecoolermaster.com/en-global/products/mwe-gold-850-v3-atx-3-1.htmlRead 15 October 2026Feature text: a 90-degree 12+4pin (12V-2x6) PCIe 5.1 connector. Amazon US titles it PCIe 5.1 Ready.6Retailer pageamazon.com/Cooler-Master-Efficiency-Zero-RPM-Hexagonal/dp/B0D68VH8DRRead 15 October 2026Listing title: PCIe 5.1 Ready, ATX 3.1, 12V-2x6 cable.

PCIe 5.11Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-naRead 14 October 2026Feature list: PCIe 5.1.

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

Fully modular2Maker product pagecoolermaster.com/en-global/products/mwe-gold-850-v3-atx-3-1.htmlRead 15 October 2026Specification table: Modular Fully Modular.

Fully modular1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-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.

Lite-On3Measurementcybenetics.com/evaluations/psus/2478Read 15 October 2026DUT Information: OEM/ODM Lite-on. Tom's Hardware also names LITEON.5Reviewtomshardware.com/pc-components/power-supplies/cooler-master-mwe-gold-850-v3-power-supply-reviewRead 15 October 2026Internal Design: the OEM is LITEON.

Channel Well Technology (CWT)5Measurementcybenetics.com/evaluations/psus/2396Read 14 October 2026DUT Information: OEM/ODM Channel Well Technology. Parts description: Manufacturer (OEM) CWT.6Reviewhwbusters.com/psus/corsair-rm1000x-atx-v3-1-psu-reviewRead 14 October 2026Technical specifications: OEM Channel Well Technology (CWT).

Power

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

850W2Maker product pagecoolermaster.com/en-global/products/mwe-gold-850-v3-atx-3-1.htmlRead 15 October 2026Specification table: Watts 850W.

1,000W1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-naRead 14 October 2026Tech Specs: Continuous Power 1000 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-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-naRead 14 October 2026Overview: 1,000W continuous at 50 C. The press release also rates the power output at 50 C ambient.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 rail5Reviewtomshardware.com/pc-components/power-supplies/cooler-master-mwe-gold-850-v3-power-supply-reviewRead 15 October 2026Power Specifications table: one +12V column, 70.8 A.

Single rail6Reviewhwbusters.com/psus/corsair-rm1000x-atx-v3-1-psu-reviewRead 14 October 2026Technical specifications: 12V combined 1000W on a single 12V rail (83.3A).

+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.

70.8A2Maker product pagecoolermaster.com/en-global/products/mwe-gold-850-v3-atx-3-1.htmlRead 15 October 2026The page prints no rail table. The label photo in the product gallery (model MPX-8503-AFAG) prints +12V 70.8 A and 849.6 W. The Cybenetics power table has the same values.3Measurementcybenetics.com/evaluations/psus/2478Read 15 October 2026Power Specifications: +12V 70.8 A, 849.6 W.

83.3A1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-naRead 14 October 2026Power table: +12V 83.3A, 1000W, model RPS0198, part no. 75-005877.3Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-rmx-seriesRead 14 October 2026RM1000x power table: +12V 83.3A, 1000W, model RPS0198.

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

849.6W2Maker product pagecoolermaster.com/en-global/products/mwe-gold-850-v3-atx-3-1.htmlRead 15 October 2026Gallery label photo: +12V 849.6 W. Tom's Hardware rounds it to 850 W.3Measurementcybenetics.com/evaluations/psus/2478Read 15 October 2026Power Specifications: +12V 849.6 W.

1,000W1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-naRead 14 October 2026Power table: +12V 83.3A, 1000W.3Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-rmx-seriesRead 14 October 2026RM1000x power table: +12V 83.3A, 1000W.

+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.

120W2Maker product pagecoolermaster.com/en-global/products/mwe-gold-850-v3-atx-3-1.htmlRead 15 October 2026Gallery label photo: +5V 20 A and +3.3V 20 A with one 120 W cell for both rails.3Measurementcybenetics.com/evaluations/psus/2478Read 15 October 2026Power Specifications: 3.3V and 5V 20 A each, one 120 W cell for both rails.

150W1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-naRead 14 October 2026Power table: +3.3V 20A and +5V 20A with one 150W cell.3Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-rmx-seriesRead 14 October 2026RM1000x 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.

3A2Maker product pagecoolermaster.com/en-global/products/mwe-gold-850-v3-atx-3-1.htmlRead 15 October 2026Gallery label photo: +5VSB 3 A, 15 W.3Measurementcybenetics.com/evaluations/psus/2478Read 15 October 2026Power Specifications: 5VSB 3 A, 15 W.

3A1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-naRead 14 October 2026Power table: +5VSB 3A, 15W.3Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-rmx-seriesRead 14 October 2026RM1000x power table: +5Vsb 3A, 15W.

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

Lowest100Highest240V2Maker product pagecoolermaster.com/en-global/products/mwe-gold-850-v3-atx-3-1.htmlRead 15 October 2026Specification table: Input Voltage 100-240V, input current 10-5A, 50-60 Hz.

Lowest100Highest240V1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-naRead 14 October 2026Power table: AC input 100-240V, 47-63Hz, 12A-5A. The manual prints 12A-6A.3Owner'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 12A-6A, 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.

Yes3Measurementcybenetics.com/evaluations/psus/2478Read 15 October 2026Temperature and Compliance Info: ALPM compatible, checked. The report also shows the ATX 3.1 badge and a passed ATX v3.1 power excursion test.

Yes1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-naRead 14 October 2026Tech Specs: Modern Standby Yes. The Cybenetics report ticks ALPM compatible.5Measurementcybenetics.com/evaluations/psus/2396Read 14 October 2026Temperature and Compliance Info: ALPM (Alternative Low Power Mode) compatible, checked.

Certifications

2 of 5 differ

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.

80 PLUS Gold4Certification listclearesult.com/80plus/sites/80plus/files/manufacturer-certificate/COOLER%20MASTER_MPX-8503-AFAG_850W_SOCE%206931_Report.pdfRead 15 October 202680 PLUS ID 6931, model MPX-8503-AFAG, type ATX12V: Gold at 115V, test date 2022-12-16, rated input 100-240 V, 10-5 A, 850 W. The model code matches the unit label. The certificate lists no sample serial. The later entry MPX-8505-AFAG (ID 7816, input 12-6 A) is a different model.

Not available

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

Cybenetics Platinum3Measurementcybenetics.com/evaluations/psus/2478Read 15 October 2026Report 24PS2478A, certification ID 252478, issued Jun 18, 2024. The report names the unit GX II 850 GOLD (MWE Gold 850 V3) and notes Also sold as: MWE Gold 850 V3. The sample serial PS58513CD2312020014A1GZ has a Dec 2023 date code and its label reads model MPX-8503-AFAG. ETA Platinum badge at 115V. heise.de also ties this report to MPX-8503-AFAG-2EBEU.

Cybenetics Platinum5Measurementcybenetics.com/evaluations/psus/2396Read 14 October 2026Report 24PS2396A, certification ID 252396, issued Mar 28, 2024. The ETA badge shows Platinum at 115V. The model name is RM1000x (ATX v3.1). The maker pages and the launch press release say Cybenetics Gold without a voltage, and Hardware Busters writes that Corsair claims a lower level than the report shows. The report level is stored.

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 Platinum3Measurementcybenetics.com/evaluations/psus/2478Read 15 October 2026ETA Platinum badge at 230V.

Cybenetics Platinum5Measurementcybenetics.com/evaluations/psus/2396Read 14 October 2026The ETA badge shows Platinum at 230V. The maker says Gold without a voltage.

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

A3Measurementcybenetics.com/evaluations/psus/2478Read 15 October 2026LAMBDA A badge at 115V.

A1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-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/2396Read 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+3Measurementcybenetics.com/evaluations/psus/2478Read 15 October 2026LAMBDA A+ badge at 230V.

A1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-naRead 14 October 2026Tech Specs: Cybenetics Noise A, with no input voltage. The Cybenetics report shows A at both voltages.5Measurementcybenetics.com/evaluations/psus/2396Read 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.

89.579%3Measurementcybenetics.com/evaluations/psus/2478Read 15 October 2026Average over more than 1450 load combinations at 115V. Tested Jun 17, 2024, ambient 28-32 C.

89.047%5Measurementcybenetics.com/evaluations/psus/2396Read 14 October 2026Average over more than 1450 load combinations at 115V. Tested Mar 22, 2024 on sample serial A6GHA404L0097U, received Mar 14, 2024. Ambient 28-32 C. DUT note: CP-9020271 (Semi-Passive Off).

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

91.725%3Measurementcybenetics.com/evaluations/psus/2478Read 15 October 2026Average over more than 1450 load combinations at 230V.

91.139%5Measurementcybenetics.com/evaluations/psus/2396Read 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.

82.48%3Measurementcybenetics.com/evaluations/psus/2478Read 15 October 2026Efficiency at 2% load at 115V. The unit is above 500 W, so the 2% load applies.

73.73%5Measurementcybenetics.com/evaluations/psus/2396Read 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.

0.9923Measurementcybenetics.com/evaluations/psus/2478Read 15 October 2026Average over more than 1450 load combinations at 115V. At 230V it is 0.981.

0.9885Measurementcybenetics.com/evaluations/psus/2396Read 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.

22.87dB(A)3Measurementcybenetics.com/evaluations/psus/2478Read 15 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 18.91 dBA.

24.78dB(A)5Measurementcybenetics.com/evaluations/psus/2396Read 14 October 2026Average over more than 1450 load combinations at 115V with semi-passive mode off, so the fan was always spinning. Ambient 28-32 C. Bruel and Kjaer 2270 G4 sound analyzer. The 230V average is 24.81 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.

49.1dB(A)3Measurementcybenetics.com/evaluations/psus/2478Read 15 October 2026Typical load tests at 115V, 100% load row: 49.1 dB(A) at 2868 rpm fan speed, intake 45.51 C and exhaust 53.59 C.

36.5dB(A)5Measurementcybenetics.com/evaluations/psus/2396Read 14 October 2026Typical load tests at 115V, 100% load row: 36.5 dB(A) at 1211 rpm fan speed, ambient about 30 C. At 230V it is 35.5 dB(A) at 1113 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.

0.068W3Measurementcybenetics.com/evaluations/psus/2478Read 15 October 2026Standby power consumption at 115V with no load on +5VSB: 0.0680 W. At 230V it is 0.1253 W.

0.0178W5Measurementcybenetics.com/evaluations/psus/2396Read 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.

20.9ms3Measurementcybenetics.com/evaluations/psus/2478Read 15 October 2026Hold-Up Time and PWR_OK Signal: hold-up time 20.9 ms, AC loss to PWR_OK 18.2 ms, at maximum continuous load. The maker claims at least 16 ms at 80% load.

22.4ms5Measurementcybenetics.com/evaluations/psus/2396Read 14 October 2026Hold-Up Time and PWR_OK Signal: hold-up time 22.4 ms, AC loss to PWR_OK 18.6 ms, PWR_OK inactive to DC loss 3.8 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.

58.45mV3Measurementcybenetics.com/evaluations/psus/2478Read 15 October 2026Non-accredited. 12V ripple at full load at 115V. At 230V it is 56.06 mV. Tom's Hardware measured 52 mV at 100% load.

23.88mV5Measurementcybenetics.com/evaluations/psus/2396Read 14 October 2026Non-accredited measurement. 12V ripple at full load at 115V. At 230V it is 23.93 mV.

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

0.81%3Measurementcybenetics.com/evaluations/psus/2478Read 15 October 2026Non-accredited. 12V load regulation at 115V. At 230V it is 0.75%.

0.78%5Measurementcybenetics.com/evaluations/psus/2396Read 14 October 2026Non-accredited measurement. 12V load regulation at 115V. At 230V it is 0.77%.

Cables and connectors

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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.

ACooler Master MWE Gold 850 V3

Connector	Connectors	Cables	Length to first plug (mm)	Wire gauge	Rated power (W)
ATX 24-pin (20+4)	1	1	605	18-22AWG	Not available
CPU 8-pin (EPS, 4+4)	2	2	600	18AWG	Not available
PCIe 8-pin (6+2)	4	Not available	Not available	Not available	Not available
12V-2x6	1	1	650	16AWG	600
SATA power	6	Not available	Not available	Not available	Not available
4-pin Molex	2	Not available	Not available	Not available	Not available

Source2Maker product pagecoolermaster.com/en-global/products/mwe-gold-850-v3-atx-3-1.htmlRead 15 October 2026Specification table: ATX 24 pin 1, EPS 4+4 pin 1, EPS 8 pin 1, SATA 6, peripheral 4 pin 2, PCI-e 6+2 pin 4, 12V-2x6 1. Tom's Hardware and LDLC list the same counts. The maker gives no lengths or cable counts. Lengths and gauge of the ATX, EPS and 12V-2x6 cables come from the Cybenetics report. The report sample has a different bundle for PCIe, SATA and Molex, so those rows carry the maker counts only.3Measurementcybenetics.com/evaluations/psus/2478Read 15 October 2026Cables and Connectors table: ATX 20+4 pin 605 mm 18-22AWG, 4+4 pin EPS and 8 pin EPS 600 mm 18AWG each, 12+4 pin PCIe 650 mm (600W) 16-28AWG, three single 6+2 pin PCIe cables 550 mm, two SATA cables with 8 plugs and one Molex cable with 4 plugs. The 16-28AWG range of the 12V-2x6 cable includes the thin sideband wires, so the stored gauge is the 16AWG power wire. The PCIe, SATA and Molex counts differ from the maker's table, so only the maker counts are stored for those rows. heise.de prints a 450 W rating for the 12V-2x6 cable, the report and the Amazon US listing say 600 W.5Reviewtomshardware.com/pc-components/power-supplies/cooler-master-mwe-gold-850-v3-power-supply-reviewRead 15 October 2026Connector table, all modular: ATX 24 pin 1, EPS 4+4 pin 1, EPS 8 pin 1, PCI-E 8 pin 4, 12V-2x6 1, SATA 6, Molex 2.7Retailer pageldlc.com/en/product/PB00697440.htmlRead 15 October 2026Connectors: 1 ATX 24 pin, 4 PCI Express 6+2 pin, 1 16-pin 12V-2x6, 6 SATA, 2 Molex. This matches the maker's table.

BCORSAIR RM1000x (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)	4	4	650	16-18AWG	Not available
12V-2x6	1	1	650	16AWG	600
SATA power	12	3	505	18AWG	Not available
4-pin Molex	6	2	550	18AWG	Not available

Source1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-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, 4 PCIe 8-pin (6+2) 650 mm, 3 SATA cables with 4 plugs (505 mm to the first plug, 115 mm spacing, 850 mm total), 2 PATA cables 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 cables 25 mm. The page calls the 12V-2x6 cable rated for 600W. PATA plugs are the 4-pin Molex plugs. The Cybenetics report lists the 12V-2x6 cable at 600 mm and the SATA cable at 500 mm, which are not stored.3Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-rmx-seriesRead 14 October 2026Included cables: 1x ATX 24-pin, 2x EPS 8-pin (4+4), 1x PCIe 12V-2x6 (12+4), 4x PCIe 8-pin (6+2) for the RM1000x, 3x SATA with 4 plugs, 2x PATA with 3 plugs. Lengths 610, 750, 650, 650, 850 and 750 mm total, plus or minus 10 mm.5Measurementcybenetics.com/evaluations/psus/2396Read 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 16-24AWG range for the 12V-2x6 cable includes the thin sideband wires. Lengths are not stored from this table where the maker states them.7Reviewprofesionalreview.com/2024/09/10/corsair-rm1000x-atx3-1-reviewRead 14 October 2026Wire gauge: 12VHPWR cable 16 AWG except the SENSE0 and SENSE1 wires. Published September 10, 2024.

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

4=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

12=CalculatedFrom Cables

4-pin Molex connectors

2=CalculatedFrom Cables

6=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.

Mixed5Reviewtomshardware.com/pc-components/power-supplies/cooler-master-mwe-gold-850-v3-power-supply-reviewRead 15 October 2026All-black cables, most flat and ribbon-like without sleeving. The 12+4 pin cable has nylon sleeving and a 90-degree connector.

Embossed or debossed flat1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-naRead 14 October 2026Cable listing: Cable Type Embossed for every cable. The accessory cables are called Type-4 Debossed.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.

Fan

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

120mm2Maker product pagecoolermaster.com/en-global/products/mwe-gold-850-v3-atx-3-1.htmlRead 15 October 2026Specification table: Fan Size 120mm, 2500 RPM.

140mm1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-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/2396Read 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.

Hydrodynamic (HDB)2Maker product pagecoolermaster.com/en-global/products/mwe-gold-850-v3-atx-3-1.htmlRead 15 October 2026Specification table: Fan Bearing HDB. The Cybenetics report prints a fluid dynamic bearing fan HA1225H12F-Z. Tom's Hardware names a Yate Loon D12BH-12 with a ball bearing. The maker's HDB is stored.

Fluid dynamic (FDB)1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-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/2396Read 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-passive2Maker product pagecoolermaster.com/en-global/products/mwe-gold-850-v3-atx-3-1.htmlRead 15 October 2026Feature list: silent fan performance with a zero-RPM mode.3Measurementcybenetics.com/evaluations/psus/2478Read 15 October 2026DUT Information: Semi-Passive Operation checked.

Semi-passive1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-naRead 14 October 2026Tech Specs: Zero RPM Mode Yes. The fan stops at low to medium loads. One FAQ answer says below 40% load, which the manual does not state.5Measurementcybenetics.com/evaluations/psus/2396Read 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.

No5Reviewtomshardware.com/pc-components/power-supplies/cooler-master-mwe-gold-850-v3-power-supply-reviewRead 15 October 2026External Appearance: the front has only the AC receptacle and the on/off switch. The hybrid fan mode has no way to be disabled.

Yes1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-naRead 14 October 2026Overview: the manual fan override knob overrides Zero RPM mode. The manual says it adjusts the minimum starting fan speed.3Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-rmx-seriesRead 14 October 2026Fan speed knob: use it to override the Zero RPM fan mode and adjust the minimum starting fan speed. The fan controller overrides the knob when temperatures need more airflow.

Protection and parts

2 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)2Maker product pagecoolermaster.com/en-global/products/mwe-gold-850-v3-atx-3-1.htmlRead 15 October 2026Specification table: OPP / OVP / OTP / OCP / SCP / UVP / Surge & Inrush Protection. NLO is added from the Cybenetics protection tests. The Cybenetics OTP test did not shut the unit down, the maker's OTP claim is stored.3Measurementcybenetics.com/evaluations/psus/2478Read 15 October 2026Protection tests: NLO passed, SCP passed on all rails, surge by MOV and inrush by NTC and relay. The report has no UVP row. OTP shows Didn't shut down. Fan failure protection is missing.

Over-current (OCP), Over-voltage (OVP), Under-voltage (UVP), Over-power (OPP), Over-temperature (OTP), Short-circuit (SCP)1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-naRead 14 October 2026FAQ lists OVP, UVP, OCP, OPP, SCP and OTP. The manual's Safety and Protection section lists the same six.3Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-rmx-seriesRead 14 October 2026Safety and Protection section: OVP, UVP, OCP, OTP, SCP and OPP.7Reviewprofesionalreview.com/2024/09/10/corsair-rm1000x-atx3-1-reviewRead 14 October 2026Protections: OCP, OVP, OPP, OTP, SCP, UVP and PG, which matches the maker's six.

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-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-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.

100,000h2Maker product pagecoolermaster.com/en-global/products/mwe-gold-850-v3-atx-3-1.htmlRead 15 October 2026Specification table: MTBF greater than 100,000 hours. The test temperature is not stated.

100,000h1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-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

1 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.

Width150Height86Depth160mm(5.9 × 3.4 × 6.3 in)2Maker product pagecoolermaster.com/en-global/products/mwe-gold-850-v3-atx-3-1.htmlRead 15 October 2026Specification table: Dimensions (L x W x H) 160 x 150 x 86 mm, so depth 160, width 150, height 86.

Width150Height86Depth160mm(5.9 × 3.4 × 6.3 in)1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-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.3Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-rmx-seriesRead 14 October 2026RM1000x 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.

Not available

1.91kg(4.2 lb)6Reviewhwbusters.com/psus/corsair-rm1000x-atx-v3-1-psu-reviewRead 14 October 2026Technical specifications: 1.91 kg (4.21 lb). Corsair's 3 kg figure is not stored, since it is most likely a packed weight.

In the box

1 of 1 differ

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

AC power cable, Mounting screws5Reviewtomshardware.com/pc-components/power-supplies/cooler-master-mwe-gold-850-v3-power-supply-reviewRead 15 October 2026In the Box: mounting screws and an AC power cable. No cable straps, ties or accessories.

Not available

Links

Not compared

Product page

www.coolermaster.com/en-us/products/mwe-gold-850-v3.html1Maker product pagecoolermaster.com/en-us/products/mwe-gold-850-v3.htmlRead 15 October 2026US store page for the MWE Gold 850 V3. It lists 750 W and 850 W options. Its specification table matches the global page.

www.corsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-na1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-naRead 14 October 2026

Spec sheet

Not available

Not available

Manual

Not available

www.corsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-rmx-series3Owner'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

0 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.

10years2Maker product pagecoolermaster.com/en-global/products/mwe-gold-850-v3-atx-3-1.htmlRead 15 October 2026Feature list: 10-year warranty. The page names no market.

10years1Maker product pagecorsair.com/us/en/p/psu/cp-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-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.