[ ATX DESKTOP POWER // IDENTIFIED MODEL ]
be quiet! STRAIGHT POWER 12 850W
850 W be quiet! Straight Power 12, article BN337; this is separate from the 1000 W Straight Power 12 record and earlier Straight Power generations. Specifications below are manufacturer-source references; the physical unit’s nameplate and matching manual control.
HIGH-VOLTAGE SAFETY: Disconnect AC before external inspection. Never open, probe, or repair a PSU internally; hazardous charge can persist after unplugging. Replace a damaged, wet, burnt, modified or unidentified unit, or use qualified service.
Model-specific specifications
| Manufacturer / exact model | be quiet! STRAIGHT POWER 12 850W; model / SKU BN337. Match the complete regional suffix, hardware revision and label. |
|---|---|
| Rated capacity | 850 W continuous total output as the manufacturer-rated class; combined rail limits and operating-temperature derating remain model-specific. |
| Efficiency certification | 80 PLUS Platinum, listed by the manufacturer for this named model. Certification does not identify an unknown PSU revision or establish used-unit condition. |
| AC input | 100–240 V AC, 50–60 Hz; verify regional current rating on the nameplate. |
| DC rails | +12 V: single rail, up to 70.8 A / 850 W; +3.3 V and +5 V: 25 A each, combined limit per BN337 output table; −12 V and +5 VSB per the model label. |
| Connector set | 24-pin ATX; two EPS/CPU 4+4-pin; one native 12V-2x6 16-pin; four PCIe 6+2-pin; nine SATA; two Molex 4-pin. Use BN337’s official cable assignment sheet for cable layout. |
| ATX / PCIe revision | ATX 3.1 / PCIe 5.1 revision. |
| Mechanical envelope | 180 × 150 × 86 mm (depth × width × height). Verify mounting holes, fan/grille clearance, cable exit/side-panel clearance and tolerance against the case drawing. |
| Protections | OCP, OVP, UVP, SCP, OPP and OTP. Protection labels do not guarantee a safe outcome under a fault; use only a healthy, unmodified unit within its documented ratings. |
Compatibility & revision caveats
- The 12V-2x6 connector, native lead and 6+2-pin leads have separate use limits. Keep modular cables tied to BN337’s approved cable list; verify PSU depth, GPU cable bend room, and the label-specific rail table.
- Confirm motherboard 24-pin and EPS count/pinout, GPU cable type, total power, rail limits, chassis dimensions, cooling clearance, region and full model suffix before purchase or installation.
- Modular PSU-side pinouts are not standardized. A cable that physically fits is not evidence of electrical compatibility; use only leads explicitly approved for this exact model/revision.
- ATX, ATX12V and PCIe connector revisions describe interfaces, not quality, safety certification or automatic compatibility with every PC component.
Manufacturer product and manual sources
- be quiet! STRAIGHT POWER 12 850W product pageManufacturer product page for BN337 and the 850 W model.
- be quiet! BN337 downloads and manualManufacturer product download page for model documentation; confirm the article number before downloading.
When a broad product-family page conflicts with a model-specific manual, label or cable table, the exact unit label and corresponding model documentation take precedence.