NZXT 3.1 80+Gold 850W Fully Modular White Low Noi Noise PSU Fluid Dynamic Bearing


- Compliant with the ATX 3.1 standard to fuel high-performance PC components with stability, efficiency, and power spike resistance.
- Durable, heat-resistant 12V-2x6 connector pumps up to 600 watts to NVIDIA® GeForce RTX™ 50 Series graphics cards.
- 135mm fluid dynamic bearing fan with Zero Fan Mode is completely silent when under 50% load.
- 100% premium Japanese capacitors improve hold-up time and minimal ripple noise, ensuring reliable and stable power delivery.
- Fully modular design allows for only connecting essential cables, reducing clutter for better airflow and a neater build.
- Compact form factor frees up valuable room for cable management and more case airflow.
. Detailed Specifications
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Model / Part Number: PA‑8G2BB‑UK
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Product Series: NZXT C Series, C850 Gold
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Form Factor: ATX (compliant with ATX 3.1 / EPS 2.92 standards)
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Output Power: 850 Watts
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Efficiency Certification: 80 PLUS Gold
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Input Voltage Range: 100 – 240 V AC (auto-switching)
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Input Frequency: 50 – 60 Hz
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Power Factor Correction: Active PFC (~0.99)
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+12V Rail: 70.83 A (up to full output)
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+3.3V / +5V Rails: 22 A each (combined up to 120 W)
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+5VSB (Standby): 3 A
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Connectors (fully modular):
• 1 × 24‑pin ATX main
• 1 × 8‑pin (4+4) EPS / CPU
• 1 × 8‑pin EPS (fixed)
• 3 × 6+2‑pin PCIe
• 1 × 16‑pin (12V‑2×6) PCIe 5.0 / GPU connector
• 12 × SATA power
• 4 × Molex (4‑pin) peripheral -
Cable Lengths & Sleeving:
• 24‑pin ATX: 600 mm (nylon sleeving)
• 4+4 EPS: 700 mm
• 8-pin EPS: 700 mm
• PCIe 6+2: 650 mm
• 16‑pin (12+4): 650 mm
• SATA: 500 + 150 mm (daisy chain)
• Molex peripherals: 500 + 150 mm -
Cooling / Fan:
• Fan size: 135 × 135 × 25 mm
• Fan type: Fluid Dynamic Bearing (FDB)
• Fan speed: up to 2,300 RPM (±10 %)
• Airflow: ~93.02 CFM (minimum spec)
• Noise: ≤ 44.5 dBA (maximum)
• Features: Zero Fan Mode (fan can stop under lower load)