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Black SFX power supply with 92 mm fan, fully modular cables, compact rectangular shape

NZXT

NZXT PS-8G1BB-US 850 W SFX power supply

SKU CH-8SZN-5HA5Z MPN PS-8G1BB-US

An SFX power supply delivering 850 W with ATX 3.1 compliance, a 600 W 12V-2x6 connector, 80 PLUS Gold and Cybenetics Platinum efficiency, fully modular cables and a 92 mm FDB fan with Zero RPM mode

  • Max wattage850 W
  • Modular cablingFull Modular
  • SATA power connectorsSATA Cables: 100 + 100 mm (6)
  • Efficiency certification80 PLUS GOLD Certified
  • Supply voltage100–240 V
  • AC input frequency50/60 Hz
  • SFX form factor fits compact SFF cases
  • ATX 3.1 with 600 W 12V-2x6 powers modern GPUs
  • 80 PLUS Gold and Cybenetics Platinum cut heat and waste
  • 92 mm FDB fan with Zero RPM mode runs silently
  • Fully modular cables and combs simplify routing in tight builds

Compact SFX power supply for small builds

The NZXT PS-8G1BB-US is an 850 W SFX unit built for small form factor cases where space is tight. Its compact dimensions let it fit into chassis that cannot accept a standard ATX supply. Fully modular cables mean you connect only what the build needs, reducing clutter in confined interiors. Japanese capacitors rated to 105 °C support long-term reliability under sustained loads.

ATX 3.1 standard with 12V-2x6 connector

The supply meets the ATX 3.1 specification and provides a 600 W 12V-2x6 connector for modern graphics cards. Efficiency is rated 80 PLUS Gold and Cybenetics Platinum, so less energy is wasted as heat across typical load ranges. Input voltage spans 100 to 240 V at 50 or 60 Hz, making it usable worldwide without a voltage switch. Hold-up time and tight voltage regulation help maintain stability during brief power interruptions.

92 mm FDB fan with Zero RPM mode

A 92 mm fluid dynamic bearing fan handles cooling and can stop completely at low loads for silent operation. The Cybenetics A- noise rating indicates quiet performance even when the fan is spinning. Black embossed cables include six SATA connectors on 100 + 100 mm leads and three peripheral connectors on matching leads, simplifying routing in tight spaces. The unit weighs 0.93 kg and measures 125 x 63.5 x 100 mm.

How it compares

Measured against everything we stock in ATX Desktop Power Supplies, at today’s prices. Recalculated every night.

Price $154.99
Typical for this category: the median of 10,869 items is $142.99.
Max wattage 850 W
Typical for this category: the median of 930 items is 850 W.

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Specifications

Product
Brand nameNZXT
Model namePS-8G1BB-US
Part numberPS-8G1BB-US
Product typeATX 3.1
Product colorBlack
Ports & slots
SATA power connectorsSATA Cables: 100 + 100 mm (6)
Peripheral connectorPeripherals Cable 100 + 100 mm (3)
Power
Max wattage850 W
Modular cablingFull Modular
Efficiency certification80 PLUS GOLD Certified
Supply voltage100–240 V
AC input frequency50/60 Hz
Size & build
Product dimensions125 × 63.5 × 100 mm
Product weight0.93kg
Shipping weight2.27 kg
Package size279 × 184 × 121 mm

Questions about this item

Should I pick the 850 W SFX model or a higher-wattage unit?

The C850 SFX Gold delivers 850 W in the compact SFX form factor, so it fits small cases while still powering demanding graphics cards through its 600 W 12V-2x6 connector.

What does the 850 W rating mean once the unit is installed?

It means the supply can continuously deliver up to 850 W total system power with 80 PLUS Gold and Cybenetics Platinum efficiency, low ripple, tight voltage regulation and long hold-up time for stable operation.

What does ATX 3.1 actually cap in practice?

ATX 3.1 compliance ensures the PSU meets the latest power-excursion and timing requirements, and the included 600 W 12V-2x6 cable supports PCIe 5.1 graphics cards without adapters.

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