be quiet! Pure Power 13 M 850W – ATX 3.1 80 PLUS Gold Modular PSU

PURE POWER 13 M · 850W · ATX 3.1 · 80 PLUS GOLD

Quiet, steady power for a single-GPU workstation.

A fully modular 850 W ATX 3.1 power supply with a native 600 W 12V-2x6 cable and four PCIe 6+2-pin connectors, sized for a focused single-GPU AI or creative workstation.

850 W continuous · 12V-2x6 up to 600 W · 160 mm body

Where it fits

A power foundation for a desktop workstation built around one current graphics card and an AM5 Ryzen processor. All 850 W are available on a single +12V rail, and be quiet! specifies that the unit handles short power excursions of up to twice its rated power. In semi-passive mode the 120 mm fan stays off at low load, keeping an idle development or editing machine quiet. This is a power supply only, not a complete AI computer; multi-GPU builds need their own power calculation.

Compatibility before checkout

Gigabyte recommends an 850 W system PSU for the RTX 5080 Windforce OC SFF and 750 W for the RTX 5070 Ti Windforce OC SFF; ASUS recommends 550 W for the Dual RTX 5060 Ti OC. This unit meets each of those single-card recommendations, but the complete build determines the real requirement: add the CPU, storage, fans and any expansion cards before deciding. The 160 × 150 × 86 mm body suits standard ATX PSU bays with room for the modular cables behind it; the Lian Li Lancool III specification allows PSUs up to 220 mm long, subject to drive-cage and cable layout. Use only the cables supplied with this unit: modular cable pinouts differ between brands and series, and mixing them can damage hardware.

Connectors and cabling explained

The native 12V-2x6 cable delivers up to 600 W to graphics cards with a 16-pin power socket, such as the RTX 5080 and RTX 5070 Ti Windforce cards; seat the connector fully and follow the GPU and PSU cable instructions. Four PCIe 6+2-pin connectors serve cards with 8-pin inputs, such as the Dual RTX 5060 Ti. For the motherboard there is a 20+4-pin ATX connector plus one 4+4-pin and one 8-pin CPU (EPS) connector for boards with two CPU power inputs. Six SATA and two 4-pin peripheral (Molex) connectors cover drives and accessories. The flat, sleeved cables are fully modular: 55 cm to the motherboard and up to 95 cm maximum cable length.

Technical specifications

What is included

One be quiet! Pure Power 13 M 850W power supply (BP027EU) with its fully modular cable set: 20+4-pin ATX, CPU 4+4-pin and 8-pin, 12V-2x6, PCIe 6+2-pin, SATA and 4-pin Molex cables. be quiet! lists mounting screws, cable ties and a multilingual user manual in the scope of delivery. The package data also lists an AC power cable.

Graphics card, motherboard, CPU, case and other components are not included. Cables from other power supplies are not compatible substitutes.

Frequently asked questions

Is 850 W enough for an RTX 5080 workstation?

It meets Gigabyte’s 850 W system PSU recommendation for the RTX 5080 Windforce OC SFF in our range for a single-card build. Additional drives, expansion cards or a heavier overall configuration reduce the headroom, so total your complete build before ordering.

Does it have a native 12V-2x6 (16-pin) GPU cable?

Yes. be quiet! includes one native 12V-2x6 cable rated up to 600 W, plus four PCIe 6+2-pin connectors for cards with 8-pin inputs.

Can I run two graphics cards from it?

It provides one 12V-2x6 cable and 850 W in total. The GPU makers’ recommendations quoted above are for single-card systems, so calculate the full multi-GPU load and choose a PSU sized for it.

Can I reuse modular cables from another power supply?

No. Modular cable pinouts are not standardised between manufacturers or product series. Use the cables supplied with this unit.

Does the fan run all the time?

No. In semi-passive mode the 120 mm fan stops at low load and starts when cooling is needed.

Plan your complete build

Browse our computer components and AI workstation range. For a single-GPU build, pair it with a card such as the Gigabyte RTX 5080 Windforce OC SFF and a case such as the Lian Li Lancool III RGB; confirm power, clearance and cabling for the complete build before ordering.

Read the official be quiet! Pure Power 13 M 850W specifications for current details.