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

Montech

Montech Century G5 850 power supply

SKU CH-TA4Q-4185M MPN Century G5 850

An ATX 3.0 and PCIe 5.0 ready 850 W unit with 80 PLUS Gold efficiency, a 120 mm FDB fan, full Japanese capacitors and fully modular cables

  • Max wattage850 W
  • Power efficiency90% Typically
  • Modular cablingFull Modular
  • Fan configuration1 × 120 mm (FDB Fan)
  • Power factor correctionActive PFC (>0.9 typical)
  • Main power connector20+4Pin

Model ATX 3.0 80+ Gold (850W)

  • 80 PLUS Gold efficiency reduces wasted energy with 90% typical performance
  • ATX 3.0 and PCIe 5.0 ready for modern graphics cards
  • Full-bridge LLC topology delivers stable voltage under load
  • Japanese 105°C capacitors ensure long-term reliability
  • 120 mm FDB fan provides quiet cooling at 150 mm depth

Power delivery for modern builds

The Montech Century G5 850 is an Intel ATX12V power supply rated at 850 W. It meets ATX 3.0 and PCIe 5.0 requirements and carries 80 PLUS Gold certification with 90% typical efficiency. A single 120 mm FDB fan provides cooling while the fully modular design keeps cable routing clean. Japanese 105°C capacitors and a full-bridge LLC topology with DC-DC conversion support stable output across the 100-240 V input range.

Suited for high-efficiency systems.

Builders who want Gold-level efficiency, PCIe 5.0 connectivity and quiet operation in a compact 150 mm chassis will find this unit a strong match. Systems that demand multiple 12VHPWR cables or sustained loads well beyond 850 W should look at higher-capacity platforms. The six integrated protections — OVP, OPP, OTP, SCP, OCP and UVP — cover standard safety needs for mainstream and enthusiast configurations alike.

The 12VHPWR connector decides compatibility

A single 12+4 pin PCIe 5.0 connector is included alongside two CPU 4+4 pin cables, two PCIe 6+2 pin cables, three SATA strings and one Molex string. If your graphics card requires the 12VHPWR interface, this supply connects it directly without adapters. If the build needs two such connectors, a different power supply is required.

How it compares

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

Price $104.99
Cheaper than about 65% 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 nameMontech
Model nameCentury G5 850
Product typeIntel ATX12 V
Ports & slots
SATA power connectors3
Output type+3.3 V@20A, +5 V@20A
Connection typesM/B 20+4Pin x 1
CPU 4+4Pin x 2
PCIE 6+2 x (2 Connectors)*2
SATA x (6 Connectors)*3
Molex 4Pin x (3 Connectors)*1
12+4PCIe 5.0 × 1
Power
Max wattage850 W
Power efficiency90% Typically
Modular cablingFull Modular
Power factor correctionActive PFC (>0.9 typical)
Main power connector20+4Pin
Efficiency certification80 PLUS GOLD Certified
Built-in protectionOVP / OPP / OTP / SCP / OCP/ UVP
Supply voltage100–240 V
AC input frequency47–63 Hz
Rated input current12A
Size & build
Product dimensions150 × 140 × 86 mm
Product weight3.165 lb (1.44 kg)
Shipping weight2.86 kg
Package size305 × 229 × 127 mm
Compatibility
PSU length limit150 mm
Environment & compliance
Regulatory approvalscTUVus / TUV / CB / CE / FCC / RoHS / BSMI
More details
Fan configuration1 × 120 mm (FDB Fan)

Other versions of this model

5 more in the same range

Questions about this item

Will the 850 W unit work with my older motherboard that still uses a 20+4 pin main connector and dual 4+4 pin CPU cables?

Yes, the supply ships with a 20+4 pin motherboard cable and two 4+4 pin CPU cables, matching legacy boards while also providing a 12+4 pin PCIe 5.0 connector for newer graphics cards.

How can I verify the PSU is delivering stable power after installation?

Check that the 120 mm FDB fan spins quietly and monitor system voltages in BIOS or software; the unit’s 80 PLUS Gold rating and active PFC above .9 typical indicate it meets spec under load.

What cables come in the box and what must I source separately?

The package includes the 20+4 pin motherboard cable, two 4+4 pin CPU cables, two 6+2 pin PCIe cables, three SATA cables and one Molex cable; any extra SATA or PCIe cables beyond those counts are not included.

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