Power supplies / Compare

be quiet! Pure Power 13 M 850W vs CORSAIR CX750M ATX 3.1

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Product A: be quiet!

Pure Power 13 M 850W

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Product B: CORSAIR

CX750M ATX 3.1

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Abe quiet! Pure Power 13 M 850W

BCORSAIR CX750M ATX 3.1

General

5 of 12 differ

Series

Pure Power 13 M5Retailer pageparadigit.ie/be-quiet-pure-power-13-m-850w/21819497/productRead 14 October 2026Listing title: be quiet! Pure Power 13 M 850W.

CX-M1Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026CX-M Series. The manual calls it CX-M Series (3rd GEN). The older CX750M (CP-9020222) is a different product.

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

BP027US, BP027U2, BP027EU1Maker product pagebequiet.com/en/powersupply/5952Read 14 October 2026The search result title of this URL reads Article number BP027US. BP027U2 is listed by the same maker under another page, seen only as a search result title, and BP027EU is the EU article number read on the retailer listings.4Retailer pagetanotis.com/products/be-quiet-pure-power-13-m-850w-power-supplyRead 14 October 2026MPN BP027US.

CP-9020311-NA1Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026SKU CP-9020311-NA. The power table prints MODEL RPS0229 and PART NO. 75-006838.

GTIN / EAN

42600521921917Retailer pagelambda-tek.com/be-quiet-BP027EU-sh/B50922611Read 14 October 2026EAN 4260052192191 for MPN BP027EU. Several UK and EU retailers show the same EAN. BuildCores shows another code, which is not used.

8404404969774Retailer pageglobal.channelonline.com/acme/classic/Products/overview/M026321896Read 15 October 2026Channel Online lists UPC 0840440496977 for part CP-9020311-NA, CX-M Series CX750M, North America. It is the 12-digit UPC 840440496977 with a leading zero.

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

Not available

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Status

Available5Retailer pageparadigit.ie/be-quiet-pure-power-13-m-850w/21819497/productRead 14 October 2026In stock on the Paradigit Ireland listing in October 2026 with 4 to 5 working days delivery. LDLC also lists it for sale.

Available1Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026In Stock and Best Seller on the Corsair US store at $99.99. Not stored as a launch price.

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

Not available

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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

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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.

€134.910Press articlegeeknetic.es/Noticia/34850/Ya-disponibles-las-be-quiet-Pure-Power-13-M-desde-94-90-euros.htmlRead 14 October 2026Price table for Europe: Pure Power 13 M 850W 134.90 EUR. The article names no country and does not say whether VAT is included. Be quiet! euro prices are normally shown with VAT, so the value is stored as the European launch price.

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

Not available

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ColoursiThe maker's own colour names

Black2Retailer pageinside-tech.co.uk/power-supplies-2/be-quiet-pure-power-13-m-850w-is-atx-3-1-compliant-and-pcie-5-1-compatible10-year-manufacturers-warrantyRead 14 October 2026Colour: Black. Color: Black.5Retailer pageparadigit.ie/be-quiet-pure-power-13-m-850w/21819497/productRead 14 October 2026Colour of product: Black.6Retailer pageldlc.com/en/product/PB00696818.htmlRead 14 October 2026Color: Black.

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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.

ATX8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026DUT Information: Type ATX12V. The back face is 150 x 86 mm, the ATX size.

ATX1Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026Tech Specs: PSU Form Factor ATX.

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 3.12Retailer pageinside-tech.co.uk/power-supplies-2/be-quiet-pure-power-13-m-850w-is-atx-3-1-compliant-and-pcie-5-1-compatible10-year-manufacturers-warrantyRead 14 October 2026Specifications copied from be quiet!: Form factor Version 3.1. Features: ATX 3.1 PSU.5Retailer pageparadigit.ie/be-quiet-pure-power-13-m-850w/21819497/productRead 14 October 2026ATX version 3.1, EPS version 2.92.

ATX 3.11Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026Tech Specs: ATX12V Version v3.1, EPS12V Version 2.92. The headline says ATX 3.1 and PCIe 5.1.2Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-cxm-2025Read 15 October 2026Intro: CX-M Series power supplies are ATX 3.1 compliant and PCIe 5.1 ready.

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 5.12Retailer pageinside-tech.co.uk/power-supplies-2/be-quiet-pure-power-13-m-850w-is-atx-3-1-compliant-and-pcie-5-1-compatible10-year-manufacturers-warrantyRead 14 October 2026Features: full support for PCIe 5.1 GPUs, One PCIe 5.1 12V-2x6 600W.6Retailer pageldlc.com/en/product/PB00696818.htmlRead 14 October 2026The LDLC description says PCIe 5.1 12V-2x6 cable up to 300 W. Cybenetics and be quiet! say 600 W, so the 300 W figure is not used.

PCIe 5.11Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026Headline and feature text: ATX 3.1 and PCIe 5.1, native 12V-2x6 GPU power cable.2Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-cxm-2025Read 15 October 2026Intro: PCIe 5.1 ready with a 12V-2x6 cable.

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

Fully modular2Retailer pageinside-tech.co.uk/power-supplies-2/be-quiet-pure-power-13-m-850w-is-atx-3-1-compliant-and-pcie-5-1-compatible10-year-manufacturers-warrantyRead 14 October 2026Product details: Modular Fully. Cables and connectors: Modular cables Yes.8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026DUT Information: Cable Design Fully Modular.

Semi-modular1Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026Tech Specs: Modular Semi. The power cable listing marks the 24-pin, CPU and one 8-pin PCIe cable as fixed.3Measurementcybenetics.com/evaluations/psus/2903Read 15 October 2026DUT Information: Cable Design Semi 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.

FSP8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026DUT Information: OEM/ODM FSP. Parts description: Manufacturer (OEM) FSP.

HEC3Measurementcybenetics.com/evaluations/psus/2903Read 15 October 2026DUT Information and Parts Description: OEM/ODM HEC.

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.

850W2Retailer pageinside-tech.co.uk/power-supplies-2/be-quiet-pure-power-13-m-850w-is-atx-3-1-compliant-and-pcie-5-1-compatible10-year-manufacturers-warrantyRead 14 October 2026Continuous power (W) 850. The peak power figure of 900 W is not stored.8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Manufacturer-provided information: Rated Power 850 W.

750W1Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026Tech Specs: Continuous Power W 750 Watts. The power table prints TOTAL POWER 750W.

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.

40°C2Retailer pageinside-tech.co.uk/power-supplies-2/be-quiet-pure-power-13-m-850w-is-atx-3-1-compliant-and-pcie-5-1-compatible10-year-manufacturers-warrantyRead 14 October 2026Data sheet row: Operating temperature up to (°C) 40. The row does not say continuous full power in words. Hardware Busters prints 0-50 °C for continuous full load and measured full power at 46 °C, which is a test and not a rating.

40°C1Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026Tech Specs: Continuous Output Rated Temp C 40°C.

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 rail2Retailer pageinside-tech.co.uk/power-supplies-2/be-quiet-pure-power-13-m-850w-is-atx-3-1-compliant-and-pcie-5-1-compatible10-year-manufacturers-warrantyRead 14 October 2026Multi-rail operation No, 12V single rail operation Yes.3Retailer pagescan.co.uk/products/850w-be-quiet!-pure-power-13-m-fully-modular-pcie-51-80plus-gold-single-rail-709a-12v-2x6-atx-31-psuRead 14 October 2026Internal +12V rails: Single rail. Rail 1 +12V 70.9 A.9Reviewhwbusters.com/psus/be-quiet-pure-power-13-m-850w-atx-v3-1-psu-reviewRead 14 October 2026Technical specifications: Number of 12V rails 1.

Single rail3Measurementcybenetics.com/evaluations/psus/2903Read 15 October 2026Power Specifications lists one +12V rail at 62.5 A. The 12V OCP test tripped at 75.80 A (121.28 percent of 62.5 A) at 30 °C, so one over-current limit covers the full rated +12V current. No source uses the words single 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.

70.9A2Retailer pageinside-tech.co.uk/power-supplies-2/be-quiet-pure-power-13-m-850w-is-atx-3-1-compliant-and-pcie-5-1-compatible10-year-manufacturers-warrantyRead 14 October 2026+12V1 (A) 70.9, +12V2 to +12V6 N/A.5Retailer pageparadigit.ie/be-quiet-pure-power-13-m-850w/21819497/productRead 14 October 2026Max output current (+12V1) 70.9 A. Combined power (+12V) 850 W.8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Power specifications table: +12V 70.9 A, 850 W.

62.5A1Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026CX750M power table: +12V 62.5A, 750W.2Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-cxm-2025Read 15 October 2026CX750M power table, model RPS0229, part no. 75-006838: +12V 62.5A 750W.

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

850W2Retailer pageinside-tech.co.uk/power-supplies-2/be-quiet-pure-power-13-m-850w-is-atx-3-1-compliant-and-pcie-5-1-compatible10-year-manufacturers-warrantyRead 14 October 2026Max. combined power 12V (W) 850.5Retailer pageparadigit.ie/be-quiet-pure-power-13-m-850w/21819497/productRead 14 October 2026Combined power (+12V) 850 W.8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Power specifications table: +12V 850 W.

750W1Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026CX750M power table: +12V 62.5A, 750W.2Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-cxm-2025Read 15 October 2026CX750M power table: +12V 750W.

+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.

120W2Retailer pageinside-tech.co.uk/power-supplies-2/be-quiet-pure-power-13-m-850w-is-atx-3-1-compliant-and-pcie-5-1-compatible10-year-manufacturers-warrantyRead 14 October 2026Max. combined power 3.3V + 5V (W) 120. +3.3V 22 A and +5V 22 A.5Retailer pageparadigit.ie/be-quiet-pure-power-13-m-850w/21819497/productRead 14 October 2026+3.3V and +5V 22 A each, 120 W combined as printed for each.8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Power specifications table: 3.3V and 5V 22 A each, 120 W combined.

130W1Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026CX750M power table: +3.3V 20A and +5V 20A share one 130W maximum output cell.2Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-cxm-2025Read 15 October 2026CX750M power table: +3.3V 20A 130W and +5V 20A under one 130W cell.

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

3A2Retailer pageinside-tech.co.uk/power-supplies-2/be-quiet-pure-power-13-m-850w-is-atx-3-1-compliant-and-pcie-5-1-compatible10-year-manufacturers-warrantyRead 14 October 2026+5Vsb (A) 3.5Retailer pageparadigit.ie/be-quiet-pure-power-13-m-850w/21819497/productRead 14 October 2026Max output current (+5Vsb) 3 A, 15 W.8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Power specifications table: 5VSB 3 A, 15 W.

3A1Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026CX750M power table: +5VSB 3A, 15W.2Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-cxm-2025Read 15 October 2026CX750M power table: +5Vsb 3A 15W.

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

Lowest100Highest240V2Retailer pageinside-tech.co.uk/power-supplies-2/be-quiet-pure-power-13-m-850w-is-atx-3-1-compliant-and-pcie-5-1-compatible10-year-manufacturers-warrantyRead 14 October 2026Voltage (Vac) 100 - 240. Frequency 50 - 60 Hz.8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Manufacturer-provided information: rated voltage 100-240 Vrms, 6-12 A, 50-60 Hz.

Lowest100Highest240V1Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026CX750M power table: AC input 100V-240V, input current 10A-5A, 47Hz-63Hz.2Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-cxm-2025Read 15 October 2026CX750M power table: 100V - 240V a.c., 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.

Yes8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Temperature and Compliance Info: ALPM (Alternative Low Power Mode) compatible, checked.

Yes3Measurementcybenetics.com/evaluations/psus/2903Read 15 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.

80 PLUS Platinum11Certification listclearesult.com/80plus/sites/80plus/files/manufacturer-certificate/BE%20QUIET_L13-M-850W_850W_SOCE%207802_Report.pdfRead 14 October 202680 PLUS certificate for model L13-M-850W: Platinum at 115 V, type ATX 3.1, test date 2025-04-17. The sample serials 027EUS503100009x carry the same 027EU model code as the Cybenetics sample of this unit. The maker and retailers claim 80 PLUS Gold.

Not available

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

Cybenetics Platinum8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Report 25PS2841A, certification ID 252841, issued Jun 10, 2025. ETA Platinum at 115V (badge image). The sample is the EU model (serial prefix 027EUS, BP027EU). The unit is listed as Pure Power 13 M 850W. The maker and retailers claim 80 PLUS Gold.

Cybenetics Silver3Measurementcybenetics.com/evaluations/psus/2903Read 15 October 2026Report 25PS2903A, certification ID 252903, issued Jul 28, 2025, model CX750M (ATX v3.1). ETA Silver at 115V (Cybenetics database feed, id 2903). Corsair's page says Cybenetics Bronze. The report 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 Platinum8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026ETA Platinum at 230V (badge image).

Cybenetics Silver3Measurementcybenetics.com/evaluations/psus/2903Read 15 October 2026ETA Silver at 230V (Cybenetics database feed, id 2903).

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++8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026LAMBDA A++ at 115V (badge image).

Standard++3Measurementcybenetics.com/evaluations/psus/2903Read 15 October 2026LAMBDA Standard++ at 115V (Cybenetics database feed, id 2903).

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

A++8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026LAMBDA A++ at 230V (badge image).

Standard++3Measurementcybenetics.com/evaluations/psus/2903Read 15 October 2026LAMBDA Standard++ at 230V (Cybenetics database feed, id 2903).

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.

90.834%8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Average over more than 1450 load combinations at 115V. Tested Jun 3, 2025. Ambient 28-32 C. EU sample.

86.207%3Measurementcybenetics.com/evaluations/psus/2903Read 15 October 2026Average over more than 1450 load combinations at 115V. Sample serial 4583, received Jun 30, 2025, tested Jul 22, 2025. Ambient 28-32 C.

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

92.732%8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Average over more than 1450 load combinations at 230V.

88.351%3Measurementcybenetics.com/evaluations/psus/2903Read 15 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.

72.605%8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Efficiency at 2% load at 115V. The unit is above 500 W, so the 2% load applies.

70.945%3Measurementcybenetics.com/evaluations/psus/2903Read 15 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.

0.9928Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Average over more than 1450 load combinations at 115V.

0.9943Measurementcybenetics.com/evaluations/psus/2903Read 15 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.

10.65dB(A)8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Average over more than 1450 load combinations at 115V, ambient 28-32 C. The 230V average is 10.60 dBA.

31.78dB(A)3Measurementcybenetics.com/evaluations/psus/2903Read 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 31.87 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.

26.6dB(A)8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Typical load tests at 115V, 100% load row: 26.6 dB(A) at 1164 rpm fan speed, ambient about 30 C. The maker data sheet prints 30.2 dB(A) at 100% load, which is a maker claim and is not stored.

45.3dB(A)3Measurementcybenetics.com/evaluations/psus/2903Read 15 October 2026Typical load tests at 115V, 100% load row: 45.3 dB(A) at 1955 rpm fan speed, intake 45.96 C. At 230V it is 45.1 dB(A) at 1928 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.

0.0396W8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Standby power consumption at 115V with no load on +5VSB.

0.0547W3Measurementcybenetics.com/evaluations/psus/2903Read 15 October 2026Standby power consumption at 115V with no load on +5VSB: 0.0547 W.

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.

21.8ms8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Hold-Up Time and PWR_OK Signal: hold-up time 21.8 ms, AC loss to PWR_OK 17.4 ms, at maximum continuous load. Report 2841. The maker data sheet prints 25.09 ms, which is a maker claim.

16.8ms3Measurementcybenetics.com/evaluations/psus/2903Read 15 October 2026Hold-Up Time and PWR_OK Signal: hold-up time 16.8 ms, AC loss to PWR_OK 15.0 ms, PWR_OK inactive to DC loss 1.8 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.

27.27mV8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Non-accredited. 12V ripple at full load at 115V. At 230V it is 27.94 mV.

31.07mV3Measurementcybenetics.com/evaluations/psus/2903Read 15 October 2026Non-accredited measurement. 12V ripple at full load at 115V. At 230V it is 33.42 mV.

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

0.47%8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Non-accredited. 12V load regulation at 115V. At 230V it is 0.48%.

0.69%3Measurementcybenetics.com/evaluations/psus/2903Read 15 October 2026Non-accredited measurement. 12V load regulation at 115V. At 230V it is 0.67%.

Cables and connectors

3 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.

Abe quiet! Pure Power 13 M 850W

Connector	Connectors	Cables	Length to first plug (mm)	Wire gauge	Rated power (W)
ATX 24-pin (20+4)	1	1	550	18-22AWG	Not available
CPU 8-pin (EPS, 4+4)	2	2	650	16AWG	Not available
PCIe 8-pin (6+2)	2	2	600	16-18AWG	Not available
PCIe 8-pin (6+2)	2	1	500	16-18AWG	Not available
12V-2x6	1	1	595	16AWG	600
SATA power	6	2	500	18AWG	Not available
4-pin Molex	2	1	510	18AWG	Not available

Source2Retailer pageinside-tech.co.uk/power-supplies-2/be-quiet-pure-power-13-m-850w-is-atx-3-1-compliant-and-pcie-5-1-compatible10-year-manufacturers-warrantyRead 14 October 2026Connector totals: 1 ATX 20+4, 1 P4+4, 1 P8, 1 12V-2x6, 4 PCIe 6+2, 6 SATA, 2 PATA. Max. combined power 12V-2x6 (W) 600.4Retailer pagetanotis.com/products/be-quiet-pure-power-13-m-850w-power-supplyRead 14 October 2026Cables listed: 20+4 pin, PCIe 5.1 12V-2x6, two PCIe 6+2 pin, P4+4, P8 and 2 SATA/peripheral cables. Cable lengths on the listing differ from Cybenetics, so the Cybenetics lengths are stored.8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Cables and Connectors table: ATX 550 mm 18-22AWG, 4+4 pin EPS12V and 8-pin EPS12V 650 mm 16AWG, two single 6+2 pin PCIe cables 600 mm and one 6+2 pin PCIe cable with two plugs (500 mm then 150 mm) 16-18AWG, 12+4 pin PCIe 595 mm (600W) 16-28AWG, SATA cable 500 mm with 150 mm spacing for 4 plugs and a second SATA and Molex cable starting at 510 mm for 2 SATA and 2 Molex plugs. The 16-28AWG range includes the thin sideband wires, so the 16AWG power wire gauge is stored. The two Molex plugs sit on the second SATA and Molex cable, so the molex row takes that cable's 510 mm to its first plug.9Reviewhwbusters.com/psus/be-quiet-pure-power-13-m-850w-atx-v3-1-psu-reviewRead 14 October 2026Technical specifications: 2x EPS (2 cables), 4x PCIe 6+2 pin (3 cables), 1x PCIe 12+4 pin (600W), 6x SATA (2 cables), 2x 4-pin Molex (1 cable). The modular panel has nine sockets, including a native 12V-2x6 header. The review lists an MSRP of 150 USD excluding VAT but names no region, so no launch price is stored.

BCORSAIR CX750M ATX 3.1

Connector	Connectors	Cables	Length to first plug (mm)	Wire gauge	Rated power (W)
ATX 24-pin (20+4)	1	1	600	18-22AWG	Not available
CPU 8-pin (EPS, 4+4)	2	1	500	16-18AWG	Not available
PCIe 8-pin (6+2)	4	2	500	16-18AWG	Not available
12V-2x6	1	1	600	16AWG	600
SATA power	6	2	400	18AWG	Not available
SATA power	2	1	350	18AWG	Not available
4-pin Molex	1	1	350	18AWG	Not available

Source1Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026CX750M cable listing: ATX 24-pin fixed (600mm), dual 4+4-pin / 8-pin EPS fixed (spacing 500mm, 100mm), dual 6+2-pin PCIe fixed (500mm, 100mm), dual 6+2-pin PCIe modular (500mm, 100mm), 600W 12V-2x6 modular (600mm), 3 SATA modular and 3 SATA fixed (400mm, 100mm, 100mm), 2 SATA / 1 PATA modular (350mm, 150mm, 150mm). The first spacing value is stored as the length to the first plug. Tech Specs: SATA connector 8, PATA connector 1. Wire gauges come from the Cybenetics report. Cybenetics lists 510 mm, 595 mm and 410 mm for some of the same cables, which are not stored. The 12V-2x6 gauge is a 16-24AWG range that includes sideband wires, so the 16AWG power wire gauge is stored.2Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-cxm-2025Read 15 October 2026Included Cables: 1x fixed ATX 24-pin, 1x fixed dual ATX12V/EPS12V (8-pin / 4+4-pin), 1x fixed dual 8-pin PCIe, 1x modular dual 8-pin PCIe, 1x modular 12V-2x6 (450W / 600W, CX750M 600W), 1x modular SATA (3 SATA), 1x fixed SATA (3 SATA), 1x modular 2 SATA / 1 PATA. The 600W rating is for the CX750M.3Measurementcybenetics.com/evaluations/psus/2903Read 15 October 2026Cables and Connectors table: captive ATX 24 pin 18-22AWG, 4+4 pin ATX12V 16-18AWG, 6+2 pin PCIe 16-18AWG, SATA 18AWG. Modular 6+2 pin PCIe 16-18AWG, 12+2 pin PCIe (600W) 16-24AWG, SATA 18AWG, SATA / 4-pin Molex 18AWG. The gauges are stored. The lengths are Corsair's.

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

8=CalculatedFrom Cables

4-pin Molex connectors

2=CalculatedFrom Cables

1=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.

Mixed2Retailer pageinside-tech.co.uk/power-supplies-2/be-quiet-pure-power-13-m-850w-is-atx-3-1-compliant-and-pcie-5-1-compatible10-year-manufacturers-warrantyRead 14 October 2026Sleeved cables Yes and Flat cables Yes. Tanotis lists the 20+4 pin and 12V-2x6 cables as sleeved and the PCIe 6+2, 4+4 and 8-pin cables as flat.3Retailer pagescan.co.uk/products/850w-be-quiet!-pure-power-13-m-fully-modular-pcie-51-80plus-gold-single-rail-709a-12v-2x6-atx-31-psuRead 14 October 2026Cables are described as black braided.4Retailer pagetanotis.com/products/be-quiet-pure-power-13-m-850w-power-supplyRead 14 October 2026Cable Design: Flat, Modular, Sleeved. The 20+4 pin and PCIe 5.1 cables are sleeved. The PCIe 6+2 pin, P4+4 and P8 cables are flat.

Mixed1Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026Cable listing: the fixed 24-pin, CPU and 8-pin PCIe cables are Sleeved. The modular PCIe, 12V-2x6, SATA and SATA/PATA cables are Flat.

Fan

2 of 4 differ

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

120mm2Retailer pageinside-tech.co.uk/power-supplies-2/be-quiet-pure-power-13-m-850w-is-atx-3-1-compliant-and-pcie-5-1-compatible10-year-manufacturers-warrantyRead 14 October 2026Fan size (mm) 120.8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Fan BQ QF2-12025-HS, 120 mm.

120mm1Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026Tech Specs: Fan Size MM 120mm. The feature text says a low-noise 120mm fan.

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.

Rifle2Retailer pageinside-tech.co.uk/power-supplies-2/be-quiet-pure-power-13-m-850w-is-atx-3-1-compliant-and-pcie-5-1-compatible10-year-manufacturers-warrantyRead 14 October 2026Bearing technology Rifle.3Retailer pagescan.co.uk/products/850w-be-quiet!-pure-power-13-m-fully-modular-pcie-51-80plus-gold-single-rail-709a-12v-2x6-atx-31-psuRead 14 October 20261 x 120 mm fan with rifle bearing, 2000 RPM max.8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Fan BQ QF2-12025-HS, 120 mm, rifle bearing.

Sleeve1Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026Tech Specs: Fan Bearing Technology Sleeve. Cybenetics prints sleeve bearing in its DUT block and fluid dynamic bearing in the fan model line for the same fan HA1225H12F-Z. The maker figure is stored.

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-passive2Retailer pageinside-tech.co.uk/power-supplies-2/be-quiet-pure-power-13-m-850w-is-atx-3-1-compliant-and-pcie-5-1-compatible10-year-manufacturers-warrantyRead 14 October 2026Features: Semi-passive construction. The data sheet row Cybenetics NoiseRating No is out of date, since the Cybenetics report gives A++.3Retailer pagescan.co.uk/products/850w-be-quiet!-pure-power-13-m-fully-modular-pcie-51-80plus-gold-single-rail-709a-12v-2x6-atx-31-psuRead 14 October 2026Semi-passive, zero-RPM operation at light loads.6Retailer pageldlc.com/en/product/PB00696818.htmlRead 14 October 2026Power supply type: Semi-passive.8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Semi-Passive Operation checked.

Always on1Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026Tech Specs: Zero RPM Mode No. The feature text says a custom fan curve keeps it silent under low-to-moderate loads, which is not a fan stop.

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.

No9Reviewhwbusters.com/psus/be-quiet-pure-power-13-m-850w-atx-v3-1-psu-reviewRead 14 October 2026Product photos page: at the front side there is no switch to enable or disable semi-passive operation.

No1Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026Tech Specs: Zero RPM Mode No, so there is no semi-passive mode to switch off.

Protection and parts

0 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)2Retailer pageinside-tech.co.uk/power-supplies-2/be-quiet-pure-power-13-m-850w-is-atx-3-1-compliant-and-pcie-5-1-compatible10-year-manufacturers-warrantyRead 14 October 2026OTP, OCP, OPP, SCP, OVP, UVP and SIP (surge and inrush protection) all Yes. NLO comes from the Cybenetics protection tests.8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Protection Features (Manufacturer) lists OPP, +12V OCP, OTP, SCP, surge and inrush current protection. The protection tests tick UVP at 90 V and 80 V and NLO.

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-cxm-2025Read 15 October 2026Safety and Protection section describes over-voltage (OVP), over-current (OCP), over-temperature (OTP), short-circuit (SCP) and over-power (OPP) protection. UVP, NLO and SIP come from the Cybenetics protection tests.3Measurementcybenetics.com/evaluations/psus/2903Read 15 October 2026Protection Features: UVP passed at 90 V full load and at 80 V (no damage), NLO checked, surge protection by MOV and inrush protection by NTC. The manufacturer block lists OPP, OCP (+12V), OTP, SCP, surge and inrush protection and no fan failure protection.

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

Not available

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.

100,000h2Retailer pageinside-tech.co.uk/power-supplies-2/be-quiet-pure-power-13-m-850w-is-atx-3-1-compliant-and-pcie-5-1-compatible10-year-manufacturers-warrantyRead 14 October 2026Average life time (h / 25°C) >100,000. Stored as 100000 and published as more than that.5Retailer pageparadigit.ie/be-quiet-pure-power-13-m-850w/21819497/productRead 14 October 2026Mean time between failures (MTBF) 100000 h. The test temperature is not stated here. Inside Tech gives it as 25 °C.

100,000h1Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 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.

Width150Height86Depth160mm(5.9 × 3.4 × 6.3 in)2Retailer pageinside-tech.co.uk/power-supplies-2/be-quiet-pure-power-13-m-850w-is-atx-3-1-compliant-and-pcie-5-1-compatible10-year-manufacturers-warrantyRead 14 October 2026Dimensions without cable (L x W x H) 160 x 150 x 86 mm. Hardware Busters gives 85 mm for the height.3Retailer pagescan.co.uk/products/850w-be-quiet!-pure-power-13-m-fully-modular-pcie-51-80plus-gold-single-rail-709a-12v-2x6-atx-31-psuRead 14 October 2026150 x 86 x 160 (W x H x D).9Reviewhwbusters.com/psus/be-quiet-pure-power-13-m-850w-atx-v3-1-psu-reviewRead 14 October 2026Technical specifications: 150 x 85 x 160 mm (W x H x D). The maker data sheet gives 86 mm for the height.

Width150Height86Depth140mm(5.9 × 3.4 × 5.5 in)1Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026Tech Specs: Dimensions 150mm x 86mm x 140mm. The manual gives height 86 mm, width 150 mm and length 140 mm. The feature text says a compact 140mm (length) design.2Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-cxm-2025Read 15 October 2026CX750M: height 86mm, width 150mm, length 140mm.

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.

1.76kg(3.9 lb)9Reviewhwbusters.com/psus/be-quiet-pure-power-13-m-850w-atx-v3-1-psu-reviewRead 14 October 2026Technical specifications: 1.76 kg (3.88 lb). The review does not say whether cables are included. Retailers list 2.62 kg, which is most likely the packed weight. The same review site gives 1.75 kg for the 1000W model, which is a 10 g difference in the wrong direction and is probably a weighing tolerance.

Not available

In the box

1 of 1 differ

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

be quiet! PURE POWER 13 M 850W Power Supply, AC Power Cord, 5 x Screws, 5 x Cable Ties4Retailer pagetanotis.com/products/be-quiet-pure-power-13-m-850w-power-supplyRead 14 October 2026Items Included: power supply, AC power cord, 5 x screws, 5 x cable ties, plus the cables. The AC cord differs per region.

CX-M Series ATX Power Supply, Modular DC Cable Set, AC Power Cable, Warranty & Safety Documentation1Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026Package Contents: CX-M Series ATX Power Supply, Modular DC Cable Set, AC Power Cable, Warranty & Safety Documentation. The cables are stored in the cables field. The AC cable differs per region.

Links

Not compared

Product page

www.bequiet.com/en/powersupply/59521Maker product pagebequiet.com/en/powersupply/5952Read 14 October 2026Maker page for BP027US. The agent did not open it, since bequiet.com is on the blocked list. No value is taken from the page.

www.corsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-na1Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026

Spec sheet

Not available

Not available

Manual

Not available

www.corsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-cxm-20252Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-cxm-2025Read 15 October 2026Corsair quick start guide for the CX-M Series (3rd GEN). It covers the CX650M and the CX750M.

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.

10years2Retailer pageinside-tech.co.uk/power-supplies-2/be-quiet-pure-power-13-m-850w-is-atx-3-1-compliant-and-pcie-5-1-compatible10-year-manufacturers-warrantyRead 14 October 202610-year manufacturer's warranty.3Retailer pagescan.co.uk/products/850w-be-quiet!-pure-power-13-m-fully-modular-pcie-51-80plus-gold-single-rail-709a-12v-2x6-atx-31-psuRead 14 October 2026Warranty 10 years (120 months), return to base, on the UK listing. Hardware Busters also gives 10 years.4Retailer pagetanotis.com/products/be-quiet-pure-power-13-m-850w-power-supplyRead 14 October 2026Limited 10-Year Manufacturer Warranty on the BP027US listing.9Reviewhwbusters.com/psus/be-quiet-pure-power-13-m-850w-atx-v3-1-psu-reviewRead 14 October 2026Warranty: 10 Years.

7years1Maker product pagecorsair.com/us/en/p/psu/cp-9020311-na/cx-m-series-cx750m-atx-3-1-cybenetics-bronze-semi-modular-psu-cp-9020311-naRead 15 October 2026Tech Specs: Warranty 7 Year. The page is the Corsair US store.2Owner's manualcorsair.com/us/en/explorer/diy-builder/power-supply-units/corsair-cxm-2025Read 15 October 2026Warranty: CX-M Series (3rd GEN) power supplies have a 7-year warranty.

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