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Black rectangular ATX power supply with modular cable ports and a 135 mm fan grille

NZXT

NZXT PA-8G2BB-US 850 W ATX 3.1 power supply

SKU CH-D89D-GV89H MPN PA-8G2BB-US

Fully modular 850 W ATX 3.1 unit with 80 Plus Gold efficiency, a 135 mm FDB fan and 160 mm depth for compact builds

  • TypeATX12V v3.1 / EPS12V v2.92
  • Maximum Power850 W
  • ModularFull Modular
  • Fans1 x 135 mm FDB
  • PFCActive @0.99
  • Energy-Efficient80 PLUS GOLD Certified

Options 850W (Black)

  • ATX 3.1 standard prepares the build for modern GPU power demands
  • 850 W continuous output feeds high-end CPUs and graphics cards together
  • 80 Plus Gold certification keeps efficiency high and waste heat low
  • Fully modular cabling lets you install only the wires your system needs
  • 135 mm FDB fan runs quietly while moving ample airflow

850 W ATX 3.1 power supply

This fully modular unit delivers 850 W of continuous power for high-end desktop builds. It meets the ATX12V v3.1 and EPS12V v2.92 specifications and carries 80 PLUS Gold certification. A single 135 mm FDB fan provides cooling across the 160 mm depth chassis. The black finish suits standard ATX cases.

Replaces older ATX 2.x units

The ATX 3.1 compliance adds native 12V-2x6 support for modern graphics cards without adapters. Full modular cabling removes unused leads and improves airflow compared with semi-modular or fixed designs. The upgrade is worth it when building around current-generation GPUs that demand the new connector standard. Older systems without 12V-2x6 requirements gain no functional advantage.

Handles multi-GPU and heavy CPU loads

The +12 V rail supplies up to 850 W combined, giving headroom for overclocked CPUs and top-tier graphics cards. Minor rails provide 3.3 V at 22 A and 5 V at 22 A for legacy peripherals. Protection circuits include OVP, UVP, SCP, OTP, OPP and OCP. The unit runs out of capacity when total system draw exceeds the 850 W rating or when connector count limits additional devices.

Highlights

  • ATX 3.1 standard prepares the build for modern GPU power demands
  • 850 W continuous output feeds high-end CPUs and graphics cards together
  • 80 Plus Gold certification keeps efficiency high and waste heat low
  • Fully modular cabling lets you install only the wires your system needs
  • 135 mm FDB fan runs quietly while moving ample airflow

Specifications

BrandNZXT
ModelPA-8G2BB-US
Part NumberPA-8G2BB-US
TypeATX12V v3.1 / EPS12V v2.92
Maximum Power850 W
ModularFull Modular
Fans1 x 135 mm FDB
PFCActive @0.99
Energy-Efficient80 PLUS GOLD Certified
Input Voltage100 - 240 V
Input Frequency Range50/60 Hz
Input Current10A-5A
Output+3.3V@22A, +5V@22A, [email protected] , +5VSB@3A
MTBF>100,000 Hours
ApprovalsFCC, Canada, CE, CB(IEC 62368-1), UKCA, CCC, BSMI, BIS, RCM, UAE, TUV, cTUVus, KC, CP65
Connectors24-pin ATX Power Cable: 600mm with nylon sleeving, Output Connectors: 1
4+4-pin CPU Power Cable: 700mm with nylon sleeving, Output Connectors: 1
8-pin CPU Power Cable: 700mm with nylon sleeving, Output Connectors: 1
6+2-pin PCIe Power Cable: 650mm with nylon sleeving, Output Connectors: 3
16-pin (12+4) 12V-2x6 PCIe Cable: 650mm with nylon sleeving, Output Connectors: 1
SATA Cable: 500+150mm, Output Connectors: 12
Peripherals Cable: 500+150mm, Output Connectors: 4
ColorBlack
Max PSU Length160 mm
ProtectionOVP (Over Voltage), UVP (Under Voltage), SCP (Short Circuit), OTP (Over Temp), OPP (Over Power), OCP (Over Current)
Dimensions150 x 86 x 160 mm
Shipping weight3.79 kg
Package size483 × 216 × 121 mm

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Questions about this item

Will the 160 mm depth fit in a case rated for ATX 3.1 power supplies?

The unit measures 150 mm wide, 86 mm tall and 160 mm deep, matching the ATX 3.1 form factor, so any case that accepts a standard ATX 3.1 PSU will accommodate it.

Which cables must stay attached during a full-modular build, and which can be left in the box?

Every cable is detachable; connect the 600 mm 24-pin ATX, the 700 mm 4+4-pin CPU, the 700 mm 8-pin CPU and only the PCIe or peripheral leads your components require.

When should the 135 mm FDB fan be cleaned or the unit replaced based on the 100,000-hour MTBF?

Clean the fan intake with compressed air whenever dust builds up; the MTBF rating exceeds 100,000 hours, so replacement is only needed if voltages drift out of spec or protections trigger.

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