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Black rectangular ATX power supply with 120 mm fan and green-accented cables

ASRock

ASRock PRO-850G 850 W power supply

SKU CH-9RTY-MZAMM MPN PRO-850G

An 850 W ATX 3.1 power supply with 80 PLUS Gold efficiency, a native 12V-2x6 connector, and a quiet 120 mm fan

  • Max wattage850 W
  • Fan configuration1 × 120 mm
  • PSU length limit140 mm
  • Efficiency certification80 PLUS GOLD Certified
  • Built-in protectionOCP, SCP, OVP, UVP, OTP, OPP
  • Mean time between failures>100,000 h

Wattage 850W

  • 850 W output powers demanding builds
  • 80 PLUS Gold certification cuts wasted energy
  • ATX 3.1 and PCIe 5.1 ready for modern GPUs
  • Native 12V-2x6 connector with dual-colour design confirms full insertion
  • 120 mm fan and 140 mm depth keep noise low in compact cases

850 W ATX 3.1 power supply

The ASRock PRO-850G delivers 850 W of continuous power through an ATX 3.1 compatible design. It carries 80 PLUS Gold certification for high efficiency under typical loads. A single 120 mm fan provides cooling while the unit fits a compact 140 mm depth. The fully black finish suits standard desktop builds.

Who should choose this unit

Builders needing a native 12V-2x6 connector for modern graphics cards will find the required PCIe 5.1 cable included. The dual-colour connector helps confirm a secure seat during assembly. Systems that require multiple EPS cables or more than two 6+2 pin PCIe plugs should consider a different model.

Deciding specification — native 12V-2x6 cable

The presence of a factory-fitted 12+4 pin PCIe 5.1 connector is the single detail that determines compatibility with current high-end GPUs. Without it an adapter would be required, adding bulk and potential failure points. Verify your graphics card needs this connector before purchasing.

How it compares

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

Price $73.99
Cheaper than about 78% 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 nameASRock
Product linePRO Series
Model namePRO-850G
Product colorBlack
Product typeATX 3.1 Compatible
Power
Max wattage850 W
Efficiency certification80 PLUS GOLD Certified
Built-in protectionOCP, SCP, OVP, UVP, OTP, OPP
Size & build
Product dimensions140 × 150 × 86 mm
Shipping weight1.81 kg
Package size267 × 203 × 102 mm
Compatibility
PSU length limit140 mm
More details
Fan configuration1 × 120 mm
Mean time between failures>100,000 h

Other versions of this model

2 more in the same range

Questions about this item

Will the 120 mm fan need replacing before the 100000-hour MTBF rating?

The unit is rated for more than 100000 hours mean time between failures, so the fan should last the rated period under normal use.

What limits output first when the PSU runs at full 850 W continuously?

Over-temperature protection will engage before sustained 850 W load can damage the unit.

How loud and hot does the 120 mm fan get during all-day operation?

The low-noise 120 mm fan keeps sound low while 80 PLUS Gold efficiency reduces waste heat during continuous use.

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