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Silver ATX power supply unit with matte finish and modular cable ports

Montech

Montech Century II 1200 power supply

SKU CH-H3X8-6J5P3 MPN Century II 1200

Delivers 1200 W through a fully modular ATX 3.1 design with 80 Plus Gold and Cybenetics Platinum efficiency, Japanese capacitors, a 135 mm FDB fan with zero-RPM mode.

  • ColorSilver
  • TypeATX / ATX 3.1
  • Maximum Power1200 W
  • Fans1 x 135 mm
  • Main Connector20+4Pin
  • PCI-Express Connector6 x 6+2-Pin

Options 1200W

  • 1200 W output powers demanding multi-GPU builds
  • ATX 3.1 and PCIe 5.1 ready with 12V-2x6 cable
  • 80 Plus Gold and Cybenetics Platinum efficiency reduces waste heat
  • Full modular cabling with 6 PCIe and 12 SATA connectors
  • 135 mm FDB fan with zero RPM mode for silent idle

1200 W ATX 3.1 power supply for high-end builds

The Montech Century II 1200 delivers 1200 W of continuous power through an ATX 3.1 compliant design. It targets enthusiasts building systems with modern graphics cards and multi-drive arrays. Full modular cabling keeps the interior tidy and airflow unimpeded.

Sustained load behaviour

Dual efficiency certifications confirm low waste heat during extended gaming or rendering sessions. The 135 mm fluid-dynamic-bearing fan spins up only when needed, thanks to a zero RPM mode at light loads. Japanese capacitors on every rail maintain stable voltages under prolonged 100 A draw on the 12 V line.

Compatibility checks before ordering

Verify that your case accepts a unit up to 150 mm deep and provides clearance for the 135 mm fan exhaust. Ensure the motherboard has a 20+4 pin main socket and that your graphics cards can use the supplied 12V-2x6 or six 6+2 pin PCIe cables. Count SATA devices against the twelve available connectors.

Highlights

  • 1200 W output powers demanding multi-GPU builds
  • ATX 3.1 and PCIe 5.1 ready with 12V-2x6 cable
  • 80 Plus Gold and Cybenetics Platinum efficiency reduces waste heat
  • Full modular cabling with 6 PCIe and 12 SATA connectors
  • 135 mm FDB fan with zero RPM mode for silent idle

Specifications

BrandMontech
ModelCentury II 1200
ColorSilver
TypeATX / ATX 3.1
Maximum Power1200 W
Fans1 x 135 mm
Main Connector20+4Pin
PCI-Express Connector6 x 6+2-Pin
SATA Power Connector12
Max PSU Length150 mm
ModularFull Modular
Energy-Efficient80 PLUS GOLD Certified
Input Current100-240Vac 50-60Hz 15A-10A
OutputDC Output: +3.3V +5V +12V -12V +5VSB
Max. Output Current: 20A 20A 100A 0.3A 3A
Max. Output Power: 120W 1200W 3.6W 15W
Shipping weight2.95 kg
Package size297 × 226 × 124 mm

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Questions about this item

How loud does the 135 mm fan get when the 1200 W unit runs all day?

The 135 mm FDB fan includes a zero RPM mode that stops the blades at low loads, keeping noise near silent during typical use.

Which cables must I already have to connect the 6 x 6+2-Pin PCIe and 12 SATA connectors?

The supply is fully modular, so every PCIe and SATA cable ships in the box; no extra cables are required.

Will the ATX 3.1 design and 150 mm length fit my older case and motherboard?

The 150 mm depth matches standard ATX bays, and the 20+4 pin main connector works with legacy boards while the 12V-2x6 cable supports newer GPUs.

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