Power supplies / Compare

CORSAIR RM1000x (2024) vs NZXT C1200 Gold ATX 3.1

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Product A: CORSAIR

RM1000x (2024)

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B

Product B: NZXT

C1200 Gold ATX 3.1

54 of 66 known

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Only differences

ACORSAIR RM1000x (2024)

BNZXT C1200 Gold ATX 3.1

General

4 of 12 differ

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

C Series1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026The page is in the Power Supplies group of the NZXT store, headed C1200 Gold ATX 3.1. It also lists 850 W and 1000 W options. The earlier C1200 Gold (PA-2G1BB, ATX 3.0) is a different product.

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

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.

PA-2G2BB-US, PA-2G2BW-US, PA-2G2BB-UK, PA-2G2BW-UK, PA-2G2BB-EU, PA-2G2BW-EU, PA-2G2BB-JP, PA-2G2BW-JP, PA-2G2BB-AU, PA-2G2BW-AU1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026Model Number row lists PA-2G2BB (black) and PA-2G2BW (white) with the suffixes CN, UK, US, EU, JP and AU. The CN models are left out, since the page gives them a 200-240 Vac input (China and South Korea) and the AC input is not a variant field.

GTIN / EAN

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.

810074844697, 810074846325, 810074844680, 810074846318, 810074844703, 810074846332, 810074844710, 810074846349, 810074844727, 8100748463561Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026UPC row lists one UPC per model. NZXT also lists an EAN per model, which is not stored.

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

Not available

June 20245Press articlekitguru.net/components/joao-silva/computex-2024-nzxt-unveils-new-h7-flow-c-series-atx-3-1-psus-and-f-series-fansRead 14 October 2026Article dated June 5, 2024 on the Computex announcement of the C-Series Gold and Platinum ATX 3.1 PSUs. Cgmagonline's Computex article is dated June 4, 2024.

Status

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.

Available1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026The page sells the product at $199.99 for black and $204.99 for white.

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

From $199.991Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 20264Reviewkitguru.net/components/power-supplies/zardon/nzxt-c1200-atx-3-1-psu-white-reviewRead 14 October 20265Press articlekitguru.net/components/joao-silva/computex-2024-nzxt-unveils-new-h7-flow-c-series-atx-3-1-psus-and-f-series-fansRead 14 October 2026

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

Not available

Black, White1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026Color options Black and White.

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-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.

ATX1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026Tech Specs: Form Factor ATX, 150 x 86 x 160 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 3.11Maker 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.

ATX 3.11Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026Tech Specs: ATX Version 3.1, compliance standard ATX12V v3.1 / EPS12V v2.92. The page does not name a PCIe CEM version. The value comes from the Computex launch coverage.

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-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-naRead 14 October 2026Feature list: PCIe 5.1.

PCIe 5.15Press articlekitguru.net/components/joao-silva/computex-2024-nzxt-unveils-new-h7-flow-c-series-atx-3-1-psus-and-f-series-fansRead 14 October 2026Describes the C-Series ATX 3.1 PSUs as PCIe 5.1-compliant. The NZXT page does not say it and Cgmagonline's Computex article only says next-gen GPU ready.

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-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-naRead 14 October 2026

Fully modular1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026Tech Specs: Modular Fully modular.

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.

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).

Channel Well Technology (CWT)2Measurementcybenetics.com/evaluations/psus/2447Read 14 October 2026DUT Information: OEM/ODM Channel Well Technology. Parts description: Manufacturer (OEM) CWT, platform CXT.3Reviewhwbusters.com/psus/nzxt-c1200-atx-v3-1-psu-reviewRead 14 October 2026Part analysis: OEM CWT, platform CXT.

Power

5 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-9020271-na/rmx-series-rm1000x-fully-modular-power-supply-cp-9020271-naRead 14 October 2026Tech Specs: Continuous Power 1000 Watts.

1,200W1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026Tech Specs: Wattage 1200 W.

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.

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.

Not available

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

Single rail3Reviewhwbusters.com/psus/nzxt-c1200-atx-v3-1-psu-reviewRead 14 October 2026Technical specifications: one 12V rail rated at 1200W (100A).

+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.

83.3A1Maker 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.

100A1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026DC Output Rating: +12V 100 A (1200 W).

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

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.

1,200W1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026DC Output Rating: +12V 100 A (1200 W).

+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-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.

120W1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026DC Output Rating: +3.3 V and +5 V 22 A (120 W).

+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-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.

3A1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026DC Output Rating: 5VSB 3 A (15 W).

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

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.

Lowest100Highest240V1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026AC Input Rating: 100-240 Vac, 14 A, 50-60 Hz. The 200-240 Vac, 7 A rating for China and South Korea is not stored.

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

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.

Yes2Measurementcybenetics.com/evaluations/psus/2447Read 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

80 PLUS Gold1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026Tech Specs: 80 PLUS Rating Gold, 85% at 10% load, 90.1% at 20%, 91.6% at 50% and 88.7% at 100% load at 115 V. The 80 PLUS list agrees.6Certification listclearesult.com/80plus/sites/80plus/files/manufacturer-certificate/NZXT_PS-2304_1200W_SOCE%207326_Report.pdfRead 14 October 202680 PLUS ID 7326, model PS-2304, 1200W, test date 2024-03-12: Gold at 115V, typical efficiency 91.59% at 50% load, rated input 100-240V 14A. This matches NZXT's 91.6% at 50% load. The list prints no serial number or model name, so the match is by the efficiency figures and input rating.

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/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 Gold1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026Tech Specs: Cybenetics Efficiency Gold, with no input voltage. The Cybenetics report shows Gold at both voltages.2Measurementcybenetics.com/evaluations/psus/2447Read 14 October 2026Report 24PS2447A, certification ID 252447, issued May 20, 2024. ETA Gold at 115V. The model name is C1200 Gold, which is also the name of the earlier ATX 3.0 unit. The report matches the ATX 3.1 unit by its ATX v3.1 power excursion pass, its 14 A rating and its 22 A +3.3V and +5V rails.

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

Cybenetics Gold1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026Tech Specs: Cybenetics Efficiency Gold, with no input voltage. The Cybenetics report shows Gold at both voltages.2Measurementcybenetics.com/evaluations/psus/2447Read 14 October 2026ETA 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.

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.

A-1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026Tech Specs: Cybenetics Noise A-, with no input voltage. The Cybenetics report shows A- at both voltages.2Measurementcybenetics.com/evaluations/psus/2447Read 14 October 2026LAMBDA A- at 115V.

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

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.

A-1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026Tech Specs: Cybenetics Noise A-, with no input voltage. The Cybenetics report shows A- at both voltages.2Measurementcybenetics.com/evaluations/psus/2447Read 14 October 2026LAMBDA A- at 230V.

Measured

10 of 10 differ

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.

89.047%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).

88.108%2Measurementcybenetics.com/evaluations/psus/2447Read 14 October 2026Average over more than 1450 load combinations at 115V. Tested May 17, 2024 on sample serial 52241Z04700003, received May 7, 2024. Ambient 28-32 C. Semi-passive mode was selectable and not noted as off.

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

91.139%5Measurementcybenetics.com/evaluations/psus/2396Read 14 October 2026Average over more than 1450 load combinations at 230V.

90.52%2Measurementcybenetics.com/evaluations/psus/2447Read 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.

73.73%5Measurementcybenetics.com/evaluations/psus/2396Read 14 October 2026Efficiency at 2% load (more than 500 W unit) at 115V.

74.614%2Measurementcybenetics.com/evaluations/psus/2447Read 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.

0.9885Measurementcybenetics.com/evaluations/psus/2396Read 14 October 2026Average over more than 1450 load combinations at 115V.

0.9832Measurementcybenetics.com/evaluations/psus/2447Read 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.

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.

26.58dB(A)2Measurementcybenetics.com/evaluations/psus/2447Read 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 26.16 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.

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.

41.2dB(A)2Measurementcybenetics.com/evaluations/psus/2447Read 14 October 2026Typical load tests at 115V, 100% load row: 41.2 dB(A) at 1511 rpm fan speed, ambient about 30 C. At 230V it is 40.7 dB(A) at 1486 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.

0.0178W5Measurementcybenetics.com/evaluations/psus/2396Read 14 October 2026Standby power consumption at 115V with no load on +5VSB.

0.0173W2Measurementcybenetics.com/evaluations/psus/2447Read 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.

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.

29.5ms2Measurementcybenetics.com/evaluations/psus/2447Read 14 October 2026Hold-Up Time and PWR_OK Signal: hold-up time 29.5 ms, AC loss to PWR_OK 26.0 ms, PWR_OK inactive to DC loss 3.5 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.

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.

18.92mV2Measurementcybenetics.com/evaluations/psus/2447Read 14 October 2026Non-accredited measurement. 12V ripple at full load at 115V. At 230V it is 20.48 mV.

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

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

0.87%2Measurementcybenetics.com/evaluations/psus/2447Read 14 October 2026Non-accredited measurement. 12V load regulation at 115V. At 230V it is 0.86%.

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.

ACORSAIR 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.

BNZXT C1200 Gold ATX 3.1

Connector	Connectors	Cables	Length to first plug (mm)	Wire gauge	Rated power (W)
ATX 24-pin (20+4)	1	1	600	16-20AWG	Not available
CPU 8-pin (EPS, 4+4)	2	2	700	16AWG	Not available
PCIe 8-pin (6+2)	3	3	650	16-18AWG	Not available
12V-2x6	1	1	650	Not available	600
SATA power	12	3	500	18AWG	Not available
4-pin Molex	4	1	500	18AWG	Not available

Source1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026Cable Length and Connector Quantity: 24-pin ATX 600 mm (1), 4+4-pin CPU 700 mm (1), 8-pin CPU 700 mm (1), 6+2-pin PCIe 650 mm (3), 16-pin (12+4) 12V-2x6 PCIe 650 mm (1), SATA 500 + 150 mm (12), peripherals 500 + 150 mm (4). The Inside the Box list gives 3 SATA cables and 1 peripherals cable, and the maker diagram shows 4 plugs on each. Cybenetics lists the 12V-2x6 cable at 645 mm and 150 mm less 5 mm spacing for SATA, which are not stored. The overview says the 12V-2x6 connector pumps up to 600 watts. The panel has five CPU and PCI-E sockets and one 12V-2x6 socket, so all cables can be used at once (maker product photo).2Measurementcybenetics.com/evaluations/psus/2447Read 14 October 2026Cables and Connectors table: ATX 16-20AWG, 4+4 pin EPS 16AWG, 8 pin EPS 16AWG, 6+2 pin PCIe 16-18AWG, 12+4 pin PCIe (600W) 16-24AWG, SATA 18AWG, Molex 18AWG, no in-cable capacitors. The 16-24AWG range for the 12V-2x6 cable includes the thin sideband wires, so no gauge is stored for it.

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

12=CalculatedFrom Cables

12=CalculatedFrom Cables

4-pin Molex connectors

6=CalculatedFrom Cables

4=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-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.

Mixed1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026The maker's cable graphic in the Fully Modular feature shows the 24-pin, both CPU and the PCIe 6+2-pin cables with a mesh sleeve and the SATA and peripheral cables as plain flat wire. It is a drawing and not a photo, and the page text does not name the cable style.

Fan

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

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.

135mm1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026Fan Specs: Size 135 mm, PWM, 2,300 +/- 10% RPM.2Measurementcybenetics.com/evaluations/psus/2447Read 14 October 2026Cooling: 135mm Fluid Dynamic Bearing Fan (HA13525H12SF-Z), 12V, 0.5A.

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.

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.

Fluid dynamic (FDB)1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026Fan Specs: Bearing Fluid dynamic bearing.2Measurementcybenetics.com/evaluations/psus/2447Read 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-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.

Semi-passive1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026Tech Specs: Zero RPM Fan Mode Yes. The fan stays stopped until the load reaches 50%.2Measurementcybenetics.com/evaluations/psus/2447Read 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.

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.

Yes1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026FAQ: A button on the power supply turns the mode off if you want the fan spinning all the time. The product photo shows a Zero Fan ON/OFF switch at the AC inlet.3Reviewhwbusters.com/psus/nzxt-c1200-atx-v3-1-psu-reviewRead 14 October 2026External appearance: two switches on the front, one for main power and one for toggling the fan's passive operation at light loads.

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)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.

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), Fan failure (FFP)1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026Protections: OVP, UVP, SCP, OTP, OPP and OCP. The Cybenetics protection tests also show NLO and surge and inrush protection working. The Cybenetics manufacturer block also lists fan failure protection.2Measurementcybenetics.com/evaluations/psus/2447Read 14 October 2026Protection Features section: OCP, OPP, OTP and SCP on all rails, NLO checked, fan failure protection, surge protection by MOV and inrush protection by NTC thermistor and bypass relay. The report lists no OVP or UVP test.

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.

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.

Yes1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026Overview: 100% premium Japanese capacitors.3Reviewhwbusters.com/psus/nzxt-c1200-atx-v3-1-psu-reviewRead 14 October 2026Part analysis lists Nippon Chemi-Con and Rubycon electrolytic capacitors on both sides and 31 FPCAP polymer capacitors. NZXT's own statement of 100% Japanese capacitors is the basis for the value.

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-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.

100,000h1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026Operation: MTBF 100,000 hours. The test temperature is not stated. Temperature 0-50 C is the operating range and is not stored as a full power rating.

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)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.

Width150Height86Depth160mm(5.9 × 3.4 × 6.3 in)1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026Tech Specs: width 150 mm, height 86 mm, depth 160 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.

1.91kg(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.

1.86kg(4.1 lb)3Reviewhwbusters.com/psus/nzxt-c1200-atx-v3-1-psu-reviewRead 14 October 2026Technical specifications: 1.86 kg (4.1 lb). The review does not say whether cables are included. NZXT states no weight.

In the box

1 of 1 differ

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

Not available

C1200 Gold ATX 3.1, AC Power Cord, Installation Accessories1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026Inside the Box: C1200 Gold ATX 3.1, 24-pin ATX, 4+4-pin CPU, 8-pin CPU, 3x 6+2-pin PCIe, 16-pin (12+4) 12V-2x6, 3x SATA and a peripherals cable, AC Power Cord, Installation Accessories. The AC cord differs per region.

Links

Not compared

Product 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

nzxt.com/product/c1200-gold-atx1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026

Spec sheet

Not available

Not available

Manual

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

Not available

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.

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.

10years1Maker product pagenzxt.com/product/c1200-gold-atxRead 14 October 2026Tech Specs: Warranty 10 years. The page is the US store.

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