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be quiet! Pure Power 13 M 850W

be quiet!Power supply

Pure Power 13 M 850W

Released June 2025.6Retailer pageldlc.com/en/product/PB00696818.htmlRead 14 October 2026LDLC shows the product as referenced on 24 Jul 2025. The Hardware Busters review is dated June 30, 2025, and the 1000W sibling is dated 2025-06. Last checked 16 October 2026.

Power
850W
Efficiency
80 PLUS Platinum
Modular cables
Fully modular
ATX version
ATX 3.1

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At a glance

All specs

SourceCalculated

General

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.
Model numbers
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.
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.
Announced
Not available
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.
Predecessor
Not available
Successor
Not available
Launch price (US)
Not available
Launch price (EU)
€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.
Markets
Not available
Colours
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.
Form factor
ATX8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026DUT Information: Type ATX12V. The back face is 150 x 86 mm, the ATX size.
ATX version
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.
PCIe CEM version
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.
Modular 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.
Built by (OEM)
FSP8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026DUT Information: OEM/ODM FSP. Parts description: Manufacturer (OEM) FSP.

Power

Rated continuous power
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.
Full power rated up to
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.
12V rail design
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.
+12V max current
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.
+12V max power
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.
+3.3V and +5V combined power
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.
+5V standby current
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.
AC input voltage
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.
Alternative low power mode (ALPM)
Yes8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Temperature and Compliance Info: ALPM (Alternative Low Power Mode) compatible, checked.

Certifications

80 PLUS rating
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.
Cybenetics efficiency at 115V
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 efficiency at 230V
Cybenetics Platinum8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026ETA Platinum at 230V (badge image).
Cybenetics noise at 115V
A++8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026LAMBDA A++ at 115V (badge image).
Cybenetics noise at 230V
A++8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026LAMBDA A++ at 230V (badge image).

Measured

Average efficiency at 115V (measured)
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.
Average efficiency at 230V (measured)
92.732%8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Average over more than 1450 load combinations at 230V.
Light-load efficiency at 115V (measured)
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.
Average power factor at 115V (measured)
0.9928Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Average over more than 1450 load combinations at 115V.
Average noise at 115V (measured)
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.
Noise at full load at 115V (measured)
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.
Standby power with no load at 115V (measured)
0.0396W8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Standby power consumption at 115V with no load on +5VSB.
Hold-up time (measured)
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.
12V ripple at full load (measured)
27.27mV8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Non-accredited. 12V ripple at full load at 115V. At 230V it is 27.94 mV.
12V load regulation (measured)
0.47%8Measurementcybenetics.com/evaluations/psus/2841Read 14 October 2026Non-accredited. 12V load regulation at 115V. At 230V it is 0.48%.

Cables and connectors

Cables
ConnectorConnectorsCablesLength to first plug (mm)Wire gaugeRated power (W)
ATX 24-pin (20+4)1155018-22AWGNot available
CPU 8-pin (EPS, 4+4)2265016AWGNot available
PCIe 8-pin (6+2)2260016-18AWGNot available
PCIe 8-pin (6+2)2150016-18AWGNot available
12V-2x61159516AWG600
SATA power6250018AWGNot available
4-pin Molex2151018AWGNot 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.
CPU (EPS) connectors
2
PCIe 8-pin connectors
4
16-pin GPU connectors
1
SATA power connectors
6
4-pin Molex connectors
2
Cable style
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.

Fan

Fan size
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.
Fan bearing
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.
Fan mode
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.
Fan mode switch
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.

Protection and parts

Protections
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.
All-Japanese capacitors
Not available
MTBF (claimed)
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.

Monitoring and lighting

We could not find any of these 4 fields. Show them
Software monitoring
Not available
Software
Not available
Built-in power display
Not available
RGB lighting
Not available

Dimensions and weight

Front and side, drawn to scale.

Dimensions
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.
Weight
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.

In the box

In the box
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.

Warranty

Manufacturer warranty (source market)
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.

Compare with

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Variants

Each variant lists only what differs from the specs above.

Model numberGTINLaunch price (EU)Markets
BP027EU4260052192191€134.9EU
BP027USNot availableNot availableNot available
BP027U2Not availableNot availableNot available

Sources

We read 11 sources for this power supply. The numbers match the markers in the sheet.

  1. Read 14 October 2026Backs 3 fields
  2. Read 14 October 2026Backs 21 fields
  3. Read 14 October 2026Backs 6 fields
  4. Read 14 October 2026Backs 5 fields
  5. Read 14 October 2026Backs 10 fields
  6. Read 14 October 2026Backs 5 fields
  7. Read 14 October 2026Backs 2 fields
  8. Read 14 October 2026Backs 29 fields
  9. Read 14 October 2026Backs 7 fields
  10. Read 14 October 2026Backs 3 fields
  11. Read 14 October 2026Backs 1 field

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