be quiet! Pure Power 12 M 850W
Expert rating8.2 / 10
- Wattage:
- 850 W
- 80 PLUS Rating:
- Gold
- Modularity:
- Fully Modular
- ATX Standard:
- ATX 3.0
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Manufacturer: be quiet! Last updated: 2026-09-12
be quiet! Pure Power 12 M 850W (850W/80+ Gold/ATX/Fully Modular/ATX 3.0) Review
If you're searching for the be quiet! Pure Power 12 M 850W, or just looking for a solid 850W 80 PLUS Gold PSU in a ATX form factor, here's the full rundown on specs, price, and how it stacks up.
Short answer: the Pure Power 12 M 850W is a fully modular 850W unit built to the ATX 3.0 spec, and we'd recommend it if you want Gold-tier efficiency at this wattage without chasing a flagship price tag.
Efficiency and Build Quality
The Pure Power 12 M 850W carries an 80 PLUS Gold certification and Cybenetics Gold efficiency / A- noise, built on a HEC platform. Its 120mm rifle bearing fan keeps noise down, with Zero-RPM fan-stop under light loads.
Connectors and Cabling
You get 1x 24-pin ATX, 1x EPS 4+4, 1x 12V-2x6 (450W), 4x PCIe 6+2-pin, 6x SATA, 3x Molex. Cable lengths run 24-pin 600mm, EPS 650mm, 12V-2x6 600mm, PCIe 600mm, SATA 700mm, and the cables are standard black ribbon/flat, not sleeved. It's rated for a 17ms hold-up time and backed by OCP, OVP, OPP, SCP, OTP, UVP protection circuitry.
Comparison to Alternatives
Compared to the be quiet! Pure Power 12 M 750W, the Pure Power 12 M 850W lands in the same efficiency tier at a different capacity, so the choice mostly comes down to how much wattage headroom you actually need. It's also worth cross-shopping against the Cooler Master MWE Gold 750 V2 if you're weighing Gold-tier options in this wattage class; both land in a similar price bracket, so the deciding factor usually comes down to form factor, cable sleeving, and warranty length.
Specifications
Identity
| Brand | be quiet! |
|---|---|
| Model Number | Pure Power 12 M 850W |
Output and rails
| Single +12V Rail | No |
|---|
Standards and compliance
| PCIe CEM Standard | PCIe 5.0 |
|---|---|
| Hold-Up Time | 20.6 ms |
Efficiency and noise
| Measured Avg Efficiency | 89.81 % |
|---|---|
| Measured Average Noise | 25.03 dBA |
GPU power delivery
| Max Watts Per GPU Conn | 600 W |
|---|
Connector inventory
| EPS 8-pin Connectors | 2 |
|---|---|
| SATA Connectors | 6 |
| Molex Connectors | 2 |
Form factor and fit
| Length | 160 mm |
|---|---|
| Colour | Black |
Cooling
| Fan Bearing | Rifle |
|---|
Build quality
| MTBF | 100000 hours |
|---|
Cables
| Modularity | Fully Modular |
|---|
Monitoring, protection and price
| Protections | OTP, OCP, OPP, SCP, OVP, UVP, SIP |
|---|---|
| Price | 129.99 USD |
| Warranty | 10 years |
| Wattage | 850 W |
|---|---|
| 80 PLUS Rating | Gold |
| ATX Standard | ATX 3.0 |
| Form Factor | ATX |
| Cybenetics Efficiency | Platinum |
| Cybenetics Noise | A- |
| 12V-2x6 Connectors | 1 |
| Zero-RPM Mode | No |
| Sleeved Cables | Yes |
| PCIe 8-pin Connectors | 4 |
| Connector Count | 1x 24-pin ATX, 1x EPS 4+4, 1x EPS 8-pin, 1x 12VHPWR (600W), 4x PCIe 6+2-pin, 6x SATA, 2x Molex |
| Fan Size | 120 mm |
| Fan Model / Bearing | 120mm rifle bearing (BQ QF2-12025-HS) |
| OEM / Platform | HEC |
| Cable Lengths | 24-pin 550mm, EPS 600mm, 12VHPWR 600mm, PCIe 500+150mm, SATA 500+150+150+150mm |
| Source URL | https://www.bequiet.com/en/powersupply/4072 |
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating8.2 / 10
The 850W Pure Power 12 M tops out the modular M-series, giving budget-focused builders a native 12V-2x6 connector and Gold efficiency without stepping up to the pricier Straight Power line.
Best for
- High-end single-GPU gaming builds (RTX 4080/4090-class cards)
- Builders who want Gold-tier efficiency with future GPU upgrade headroom
- Systems that benefit from a native 12V-2x6 cable
Not for
- Budget builds where a 550-650W unit would be sufficient
- Extreme dual-GPU or workstation rigs needing 1200W+
- Buyers who specifically need SFX/SFX-L sizing
FAQs
What are the key specifications of the be quiet! Pure Power 12 M 850W (850W/80+ Gold/ATX/Fully Modular/ATX 3.0)?
The be quiet! Pure Power 12 M 850W (850W/80+ Gold/ATX/Fully Modular/ATX 3.0) is a power supply from be quiet!. Key specs: Wattage 850 W, 80 PLUS Rating Gold, Cybenetics Efficiency Gold, Cybenetics Noise A-, Modularity Fully Modular.
Will the be quiet! Pure Power 12 M 850W (850W/80+ Gold/ATX/Fully Modular/ATX 3.0) work with my current setup?
The be quiet! Pure Power 12 M 850W (850W/80+ Gold/ATX/Fully Modular/ATX 3.0) lists Wattage is 850 W. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.
Who is the be quiet! Pure Power 12 M 850W (850W/80+ Gold/ATX/Fully Modular/ATX 3.0) best suited to?
It suits high-end single-gpu gaming builds (rtx 4080/4090-class cards), builders who want gold-tier efficiency with future gpu upgrade headroom, systems that benefit from a native 12v-2x6 cable.
What are the drawbacks of the be quiet! Pure Power 12 M 850W (850W/80+ Gold/ATX/Fully Modular/ATX 3.0)?
It is a poor fit for budget builds where a 550-650w unit would be sufficient, extreme dual-gpu or workstation rigs needing 1200w+, buyers who specifically need sfx/sfx-l sizing.
Compare and read more
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