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Silver ATX power supply unit with a 135 mm fan and modular cable sockets

Montech

Montech Century II 850 power supply 850W ATX 3.1 PCIe 5.1 80 Plus Gold Cybenetics Platinum

SKU CH-0RW7-4ZPBM MPN Century II 850

Full-modular 850 W ATX 3.1 unit with PCIe 5.1 12V-2x6 cable, 80 Plus Gold and Cybenetics Platinum efficiency, 135 mm FDB fan with zero-RPM mode, 100 % Japanese capacitors and 150 mm depth

  • Max wattage850 W
  • Modular cablingFull Modular
  • Fan configuration1 × 135 mm
  • Main power connector20+4Pin
  • PSU length limit150 mm
  • Efficiency certification80 PLUS GOLD Certified

Model 850W

  • ATX 3.1 and PCIe 5.1 ready with native 12V-2x6 cable
  • Dual efficiency certification: 80 Plus Gold and Cybenetics Platinum
  • 100% Japanese capacitors for long-term reliability
  • 135 mm FDB fan with zero RPM mode for silent operation
  • Compact 150 mm depth fits most cases easily

What this unit delivers

The Montech Century II 850 is an 850 W ATX power supply built for modern gaming PCs. It meets ATX 3.1 and PCIe 5.1 requirements and includes a 12V-2x6 cable for current graphics cards. Full modular cabling keeps the build clean. Dual 80 Plus Gold and Cybenetics Platinum ratings confirm high efficiency across the load range.

When the upgrade makes sense

Moving from an older ATX 2.x unit without a native 12VHPWR connection removes the need for adapter cables. The jump is worth it when your graphics card draws close to the 12 V rail limit or when you want the quieter operation of a 135 mm FDB fan with zero RPM mode. Japanese capacitors and a full protection suite (OCP, OVP, UVP, SCP, OTP, OPP) add long-term reliability.

Check before you order

Verify that your case accepts a PSU up to 150 mm long. Confirm the motherboard uses a standard 20+4 pin main connector. Ensure the 100-240 V 50-60 Hz input matches your mains supply. The silver finish and compact depth suit most mid-tower layouts, but always measure the available clearance in your specific chassis.

How it compares

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

Price $64.99
Cheaper than about 82% 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 nameMontech
Model nameCentury II 850
Product colorSilver
Product typeATX
Power
Max wattage850 W
Modular cablingFull Modular
Main power connector20+4Pin
Efficiency certification80 PLUS GOLD Certified
Rated input current100-240Vac 50-60 Hz 15A-10A
Size & build
Shipping weight2.56 kg
Package size295 × 210 × 112 mm
Compatibility
PSU length limit150 mm
More details
Fan configuration1 × 135 mm

Other versions of this model

5 more in the same range

Questions about this item

Will the 150 mm length fit my ATX case?

The unit is 150 mm long, so it fits any case that accepts a standard ATX power supply of that length or longer.

How do I connect the 12V-2x6 cable for a PCIe 5.1 graphics card?

Use the supplied 12V-2x6 cable, plug it firmly into the PSU's dedicated 12VHPWR port and the card's connector until the latch clicks.

When should I clean or replace the 135 mm FDB fan?

Vacuum the fan grille every 12 months; the fluid-dynamic bearing is rated for long life, so replacement is only needed if noise or vibration appears.

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