We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Rectangular black metal PSU with gold badge, modular sockets and 120mm fan grille

GIGABYTE

GIGABYTE GP-P850GM power supply

SKU CH-AVY9-MVNXR MPN GP-P850GM

A fully modular 850 W ATX power supply with 80 Plus Gold efficiency and a 120 mm hydraulic-bearing fan that stops below 20 % load

  • Max wattage850 W
  • Power efficiency90% at typical load
  • Modular cablingFull Modular
  • Fan configuration120 mm Hydraulic Bearing (HYB) Fan
  • Power factor correctionActive (>0.9 typical)
  • Main power connector20+4Pin

Model ATX 80+ Gold (850W)

  • Full modular cabling cuts clutter and improves airflow
  • 80 PLUS Gold certification delivers 90 percent typical efficiency
  • Single +12V rail provides stable power to graphics cards
  • 120 mm hydraulic bearing fan stops below 20 percent load
  • Japanese capacitors and full protection suite extend reliability to 100000 hours MTBF

850 W ATX 12V v2.31 supply

The GIGABYTE GP-P850GM is an ATX 12V v2.31 power supply rated for 850 W of continuous output. A fully modular cable set lets builders connect only the leads they need, reducing clutter and improving airflow inside the case. The unit carries 80 PLUS Gold certification, guaranteeing 90% efficiency at typical load.

Suits single-GPU builds; avoid multi-GPU rigs

This supply fits mid-range and high-end single-GPU systems that demand clean cable routing and quiet operation. The 120 mm hydraulic-bearing fan stops completely below 20% load, keeping noise near zero during idle or light work. Builds planning multiple graphics cards should look elsewhere because only four PCIe 6+2-pin connectors are provided.

Single +12 V rail delivers the full 850 W

All 850 W are available on a single +12 V rail, so the CPU and GPU draw from one unified power pool without rail-balancing concerns. Active PFC with a typical power factor above .9 ensures stable input across 100–240 V mains. Japanese main capacitors and a full protection suite (OVP, OPP, SCP, UVP, OCP, OTP) back long-term reliability.

How it compares

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

Price $106.99
Cheaper than about 64% 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.

New to this? Buying PC parts with Monero — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameGIGABYTE
Model nameGP-P850GM
Product typeATX 12 V v2.31
Ports & slots
PCIe power connectors4 × 6+2-Pin
SATA power connectors8
Output type+3.3 V@20A, +5 V@20A, +5VSB@3A
Connection types1 x ATX/MB 20+4 Pin
2 x EPS/ATX 12 V 4+4pin
4 x PCI-e 6+2 pin
8 x SATA 5 pin
3 x Peripheral 4-pin
1 x Floppy 4-pin
Power
Max wattage850 W
Power efficiency90% at typical load
Modular cablingFull Modular
Power factor correctionActive (>0.9 typical)
Main power connector20+4Pin
12V railsSingle
Efficiency certification80 PLUS GOLD Certified
Built-in protectionOVP / OPP / SCP / UVP / OCP / OTP
Supply voltage100–240 V
AC input frequency60–50 Hz
Rated input current12A - 6A
Size & build
Product dimensions3.39 in × 5.91 in × 5.51 in
Shipping weight2.52 kg
Package size254 × 206 × 117 mm
Compatibility
PSU length limit140 mm
Environment & compliance
Regulatory approvalsBSMI / CE / CCC / FCC / TUV / RCM / CB / EAC / KCC / UL
More details
Fan configuration120 mm Hydraulic Bearing (HYB) Fan
Mean time between failures>100,000 h

Other versions of this model

4 more in the same range

Questions about this item

Will the 20+4-pin ATX connector and single +12V rail work with a motherboard built for an older ATX 12V spec?

The unit follows ATX 12V v2.31 and provides a 20+4-pin main connector plus a single +12V rail rated at 850 W, matching the physical and electrical interface used by earlier ATX 12V motherboards.

How can I confirm the 120mm hydraulic bearing fan is running correctly after installation?

The fan spins up at power-on and remains off below 20% load; you can hear it start when the system draws more power and verify the 80 PLUS Gold efficiency by checking that the unit stays cool at typical loads.

Which cables are included in the box and what must I buy separately?

The fully modular package includes the 20+4-pin ATX cable, four 6+2-pin PCIe cables, eight SATA power cables and peripheral cables; no extra cables are required for a standard build.

More in ATX Desktop Power Supplies

Similar items