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Rectangular black metal PSU with a 120 mm fan grille and modular cable sockets

XPG

XPG COREREACTORII850G-BKCUS 850 W power supply

SKU CH-X9C9-AR3ES MPN COREREACTORII850G-BKCUS

An 850 W ATX 3.0 unit with a 12VHPWR connector, full modular cabling, 80 PLUS and Cybenetics GOLD efficiency, and 100 % Japanese 105 °C capacitors

  • Max wattage850 W
  • Modular cablingFull Modular
  • Fan configuration1 × 120 mm
  • Power factor correction0.99
  • Main power connector20+4Pin
  • 12V railsSingle
  • 850 W output handles demanding GPU and CPU loads
  • Dual 80 PLUS and Cybenetics Gold certifications ensure high efficiency
  • Full modular cabling with 12VHPWR connector supports modern graphics cards
  • 100 % Japanese 105 °C capacitors provide long-term reliability
  • Compact 150 mm depth fits a wide range of cases

850 W ATX 3.0 power supply

The XPG Corereactor II 850 W unit is a fully modular power supply built to the Intel ATX 12V v3.0 design guide. It delivers a single +12 V rail and includes a native 12VHPWR 12+4 pin connector alongside four PCI-E 6+2 to 6+2 pin and two additional PCI-E 6+2 pin cables. Eight SATA power connectors and a 20+4 pin main connector complete the cable set. The 150 mm depth fits most standard ATX cases.

Dual Gold efficiency and Japanese capacitors

Certified 80 PLUS Gold and Cybenetics Gold, the supply achieves a 0.99 active PFC across a 100 to 240 V input range. All electrolytic capacitors are 105 °C rated Japanese components, and the platform includes eight industrial protection circuits. A 120 mm fan provides cooling, while the 100 000 hour MTBF at 25 °C reflects the build quality. The unit suits builders who want ATX 3.0 readiness and full modularity; those needing higher wattage or a different form factor should look elsewhere.

Native 12VHPWR connector for PCIe 5.0 graphics

The defining specification is the inclusion of a 12VHPWR 12+4 pin connector compliant with the PCIe 5.0 and ATX 3.0 standards. This single cable replaces multi-cable adapters on compatible graphics cards and ensures the power delivery required by current high-end GPUs. If your graphics card uses the 12VHPWR interface, this supply connects directly; if it does not, the additional PCI-E 6+2 pin cables cover traditional power needs.

How it compares

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

Price $90.99
Cheaper than about 71% of the 10,869 comparable items (median $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 nameXPG
Product lineCorereactor
Model nameCOREREACTORII850G-BKCUS
Product typeIntel ATX 12 V v3.0
Ports & slots
PCIe power connectors1 × 12VHPWR 12+4Pin, 4 x PCI-E 6+2 to 6+2 Pin, 2 x PCI-E 6+2 Pin
SATA power connectors8
Output type+3.3 V@22A,+5 V@22A, +5VSB@3A
Power
Max wattage850 W
Modular cablingFull Modular
Power factor correction0.99
Main power connector20+4Pin
12V railsSingle
Efficiency certification80 PLUS GOLD Certified
Overvoltage protectionYes
Supply voltage100–240 V
AC input frequency47–63 Hz
Rated input current12A
Size & build
Product dimensions140 × 150 × 85 mm
Product weight1.59kg
Shipping weight1.59 kg
Package size150 × 140 × 80 mm
Compatibility
PSU length limit150 mm
In the box
Included items1 x XPG CorereactorII 850 W GOLD POWER SUPPLY UNIT, 1x AC Power Cord, 1x User Manual, 4x PSU Screws
Environment & compliance
Regulatory approvalsCE | CB| FCC(IC) | TUV | cTUVus | TUV S-Mark | NOM | BSMI | UKCA |EAC | CCC | RCM
More details
Fan configuration1 × 120 mm
Mean time between failures100,000 h @ 25 °C

Questions about this item

Will the 12VHPWR connector work with an older GPU that only uses 6+2 pin cables?

Yes, the unit includes four 6+2-to-6+2 PCIe cables and two additional 6+2 pin cables alongside the 12VHPWR connector, so legacy cards are supported.

How can I verify the 120 mm fan and single +12 V rail are operating correctly after installation?

Check that the 120 mm fan spins at startup and monitor the +12 V rail voltage in BIOS or software; it should remain close to 12 V under load with the 80 PLUS Gold and Cybenetics Gold certifications confirming efficiency.

Which cables come in the box and what must I buy separately for a typical build?

The fully modular package supplies the 20+4 pin ATX cable, one 12VHPWR 12+4 pin cable, four 6+2-to-6+2 PCIe cables, two 6+2 PCIe cables and eight SATA connectors; no extra cables are required for standard motherboard GPU and drive connections.

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