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Black rectangular ATX power supply with a 120 mm fan grille and modular cable sockets

Phanteks

Phanteks PH-P850GH_BK01 850 W power supply

SKU CH-C1GA-7RA26 MPN PH-P850GH_BK01

Fully modular 850 W ATX 3.1 unit with PCIe 5.1 12V-2x6 connector, 80 Plus Gold efficiency, 120 mm fan with zero-RPM mode under 40 % load, Japanese capacitors, and a 140 mm compact depth

  • Max wattage850 W
  • Modular cablingFull Modular
  • Fan configuration1 × 120 mm
  • Efficiency certification80 PLUS GOLD Certified
  • Output typeOPP (Overpower Protection) OVP (Over Voltage Protection) UVP
  • Mean time between failures>100,000 h

Model PH-P850GH_BK01

  • ATX 3.1 and PCIe 5.1 platform ready for next-gen hardware
  • 80 Plus Gold efficiency lowers energy waste and heat output
  • 120 mm fan stops completely below 40 % load for silent running
  • Fully modular textured cables with combs simplify clean cable routing
  • 12V-2x6 connector delivers up to 600 W through a single cable

What the 850 W ATX 3.1 unit is

The Phanteks AMP GH 850 W power supply delivers 850 W maximum power on the Intel ATX 3.1 platform with PCIe 5.1 support. It is built with 100% Japanese capacitors and carries 80 PLUS Gold certification. The fully modular design uses individual textured cables and includes cable combs for tidy routing. A 120 mm fluid dynamic bearing fan provides a zero-RPM mode below 40% load for silent operation.

Installation and common pitfalls

The compact ATX form factor at 140 mm depth fits standard cases and the fully modular cabling means you connect only what the build needs. The 12V-2x6 GPU cable supplies up to 600 W through a single connector for modern graphics cards. Protection circuits include OPP, OVP, UVP, SCP, OCP, OTP, no-load and reset protection. MTBF exceeds 100,000 hours.

Who this suits and who should look elsewhere

Builders assembling a high-performance PC with a PCIe 5.1 graphics card and an ATX 3.1 motherboard will find the platform features and silent fan mode a good match. The 850 W ceiling limits systems that require more headroom for multiple GPUs or extreme overclocking. Buyers needing higher wattage or a different form factor should consider other options.

How it compares

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

Price $76.99
Cheaper than about 77% 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 namePhanteks
Model namePH-P850GH_BK01
Product colorBlack
Product typeIntel ATX 3.1/PCIe Gen5.1
Power
Max wattage850 W
Modular cablingFull Modular
Efficiency certification80 PLUS GOLD Certified
Size & build
Shipping weight3.04 kg
Package size305 × 229 × 122 mm
More details
Fan configuration1 × 120 mm
Mean time between failures>100,000 h

Other versions of this model

5 more in the same range

Questions about this item

How can I confirm the fan is running in zero-RPM mode during light loads?

The 120 mm fan stops below 40 % load, so silence confirms the mode is active.

Which cables and accessories are included, and what must I source separately?

Fully modular individual textured cables and cable combs are included; no extra cables are required for a standard build.

Should I choose the 750 W, 850 W, 1000 W or 1200 W version for a GPU that draws up to 600 W?

The 850 W model delivers the full 600 W through its single 12V-2x6 connector and meets ATX 3.1 specs for next-gen GPUs.

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