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be quiet! Pure Power 13 M 850W vs CORSAIR RM850e (2025)

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Pure Power 13 M 850W

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Product B: CORSAIR

RM850e (2025)

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Abe quiet! Pure Power 13 M 850W

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General

4 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.

RMe1Maker product pagecorsair.com/us/en/p/psu/cp-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 2026

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-9020296-NA, CP-9020293-NA1Maker product pagecorsair.com/us/en/p/psu/cp-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 2026

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.

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

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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-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 2026

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

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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

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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.

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

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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.

Black, White1Maker product pagecorsair.com/us/en/p/psu/cp-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 20262Maker product pagecorsair.com/us/en/p/psu/cp-9020293-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-white-cp-9020293-naRead 14 October 2026The white edition has SKU CP-9020293-NA and the same specs. It adds a dual-color 12V-2x6 connector.

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-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 2026

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-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 2026

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-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 2026Page says PCIe 5.1 compatible.

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.

Fully modular1Maker product pagecorsair.com/us/en/p/psu/cp-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-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.

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

HEC4Measurementcybenetics.com/evaluations/psus/2630Read 14 October 2026DUT Information: OEM/ODM HEC. Parts description: Manufacturer (OEM) 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.

850W1Maker product pagecorsair.com/us/en/p/psu/cp-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 2026

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.

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 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 rail5Reviewhwbusters.com/psus/corsair-rm850e-atx-v3-1-psu-reviewRead 14 October 2026Technical specifications: Number of 12V rails 1.6Retailer pagescan.co.uk/products/850w-corsair-rm850e-fully-modular-cybenetics-gold-pcie-51-single-rail-708a-120mm-fan-atx-31-psuRead 14 October 2026Specification list: single +12V rail, 70.8A (Rail 1), rails 2 to 6 not applicable.

+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.

70.8A3Owner's manualcorsair.com/explorer/diy-builder/power-supply-units/corsair-rme-series-2025Read 14 October 2026RM850e table: +12V 70.8A, 850W, model RPS0216, Corsair SKU CP-9020296/CP-9020293. The black product page prints 62.5A, which is the RM750e figure. The white page prints 70.8A.

+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.

850W3Owner's manualcorsair.com/explorer/diy-builder/power-supply-units/corsair-rme-series-2025Read 14 October 2026RM850e table: +12V 70.8A, 850W.

+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.

150W1Maker product pagecorsair.com/us/en/p/psu/cp-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 2026Power table lists +3.3V 20A and +5V 20A with 150W. The quick start guide lists 110W for the same row, which looks like a value copied from the RM650e and RM750e. Cybenetics, Hardware Busters and the white edition page all say 150W.5Reviewhwbusters.com/psus/corsair-rm850e-atx-v3-1-psu-reviewRead 14 October 2026Technical specifications: Power 5V + 3.3V 150W.

+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-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 2026

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-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 2026AC input 100-240V, 47-63 Hz.

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.

Yes4Measurementcybenetics.com/evaluations/psus/2630Read 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.

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 Gold1Maker product pagecorsair.com/us/en/p/psu/cp-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 2026The page says Cybenetics Gold without a voltage. The Cybenetics report of the same model shows Gold at both 115V and 230V.4Measurementcybenetics.com/evaluations/psus/2630Read 14 October 2026Report 24PS2630A, certification ID 252630, issued Nov 4, 2024. ETA Gold at 115V. The model name in the database is RM850e (ATX v3.1). The results apply to both the black and white variants.

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 Gold1Maker product pagecorsair.com/us/en/p/psu/cp-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 2026The page says Cybenetics Gold without a voltage. The Cybenetics report of the same model shows Gold at both 115V and 230V.4Measurementcybenetics.com/evaluations/psus/2630Read 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.

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

A1Maker product pagecorsair.com/us/en/p/psu/cp-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 2026Tech Specs tab: Cybenetics Noise A. The Cybenetics report shows A at both voltages.4Measurementcybenetics.com/evaluations/psus/2630Read 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.

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

A1Maker product pagecorsair.com/us/en/p/psu/cp-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 2026Tech Specs tab: Cybenetics Noise A. The Cybenetics report shows A at both voltages.4Measurementcybenetics.com/evaluations/psus/2630Read 14 October 2026LAMBDA 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.

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.

88.568%4Measurementcybenetics.com/evaluations/psus/2630Read 14 October 2026Average over more than 1450 load combinations at 115V. Tested Nov 4, 2024 on sample serial A9D9F4420002EL. 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.

90.783%4Measurementcybenetics.com/evaluations/psus/2630Read 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.

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.

66.87%4Measurementcybenetics.com/evaluations/psus/2630Read 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.

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

0.9824Measurementcybenetics.com/evaluations/psus/2630Read 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.

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.

22.81dB(A)4Measurementcybenetics.com/evaluations/psus/2630Read 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 22.84 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.

42.2dB(A)4Measurementcybenetics.com/evaluations/psus/2630Read 14 October 2026Typical load tests at 115V, 100% load row: 42.2 dB(A) at 1724 rpm fan speed, ambient about 30 C.

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.

0.049W4Measurementcybenetics.com/evaluations/psus/2630Read 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.

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.

18ms4Measurementcybenetics.com/evaluations/psus/2630Read 14 October 2026Hold-Up Time and PWR_OK Signal: hold-up time 18.0 ms, AC loss to PWR_OK 15.5 ms, at maximum continuous load. Report 2630.

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.

36.19mV4Measurementcybenetics.com/evaluations/psus/2630Read 14 October 2026Non-accredited measurement. 12V ripple at full load at 115V. At 230V it is 36.77 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%.

0.83%4Measurementcybenetics.com/evaluations/psus/2630Read 14 October 2026Non-accredited measurement. 12V load regulation at 115V. The 230V figure is also 0.83%.

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.

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 RM850e (2025)

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

Source1Maker product pagecorsair.com/us/en/p/psu/cp-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 2026Cable listing table: lengths 610 mm (24-pin), 750 mm (EPS), 650 mm (12V-2x6, 12V-2x6 to dual 8-pin, PCIe 8-pin), SATA 450 mm to the first plug then 100 mm spacing. Tolerance 10 mm. PCIe 8-pin is 1 single cable plus 1 cable with two 8-pin plugs, so 3 plugs on 2 cables. The 12V-2x6 cable is described as 600W capable. The SATA row covers a 4-plug SATA cable and a 2 SATA and 2 PATA cable. The two 4-pin plugs sit on the SATA and PATA cable, so the molex row takes that cable's 450 mm to its first plug. The quick start guide text lists 2 single PCIe 8-pin cables for this model, which does not match this table, the Cybenetics report or the Scan listing. The PSU side has one 12V-2x6 socket and three CPU/PCIe sockets (product photo), so the dual 8-pin cable takes the 12V-2x6 socket and cannot be used together with the native 12V-2x6 cable.4Measurementcybenetics.com/evaluations/psus/2630Read 14 October 2026Cables and Connectors table gives wire gauge per cable: ATX 18-20AWG, EPS 18AWG, 6+2 PCIe 16AWG, 2 x 6+2 PCIe 16-18AWG, 12+2 pin PCIe (600W) 16-24AWG, SATA and Molex 18AWG. The 16-24AWG range for the 12V-2x6 cable includes the thin sideband wires, so 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

6=CalculatedFrom Cables

6=CalculatedFrom Cables

4-pin Molex connectors

2=CalculatedFrom Cables

2=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.

Embossed or debossed flat1Maker product pagecorsair.com/us/en/p/psu/cp-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 2026Cable listing: every cable is Cable Type Debossed.

Fan

1 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-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 2026

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.

Rifle1Maker product pagecorsair.com/us/en/p/psu/cp-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 2026120mm rifle 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-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.

Semi-passive1Maker product pagecorsair.com/us/en/p/psu/cp-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 2026Tech Specs tab: Zero RPM Mode Yes.

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.

Not available

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)3Owner's manualcorsair.com/explorer/diy-builder/power-supply-units/corsair-rme-series-2025Read 14 October 2026Safety and Protection section lists OVP, UVP, OCP, OTP, SCP and OPP.4Measurementcybenetics.com/evaluations/psus/2630Read 14 October 2026Protection Features (Manufacturer) lists Surge Protection and Inrush Current Protection, which the quick start guide leaves out. The report also lists OPP, +12V OCP, OTP and SCP. The protection tests tick NLO.

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-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 2026Tech Specs tab: 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-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 2026Tech Specs tab: 140x150x86. The quick start guide gives 140 mm (L) x 150 mm (W) x 86 mm (H). Depth is 140 mm and the back face is 150 x 86 mm.

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.

1.53kg(3.4 lb)5Reviewhwbusters.com/psus/corsair-rm850e-atx-v3-1-psu-reviewRead 14 October 2026Technical specifications: 1.53 kg. The review does not say whether cables are included. Corsair's 2 kg figure most likely includes the cables, so it is not stored.

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.

Power Supply, AC Cable, DC Cables, Cable Ties, Mounting Screws, Safety Leaflet3Owner's manualcorsair.com/explorer/diy-builder/power-supply-units/corsair-rme-series-2025Read 14 October 2026RM850e Specifications, Package Contents.

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-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-na1Maker product pagecorsair.com/us/en/p/psu/cp-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 2026

Spec sheet

Not available

Not available

Manual

Not available

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

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-9020296-na/rme-series-rm850e-fully-modular-low-noise-atx-power-supply-cp-9020296-naRead 14 October 2026Tech Specs tab: Warranty 7 Year. Page is corsair.com US, so the market is US.

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