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Silver rectangular ATX power supply with Montech branding, modular cable ports, 135mm fan grille, matte metallic finish

Montech

Montech Century ll 550W power supply

SKU CH-4XHW-AVWDP MPN Century ll 550W

A fully modular ATX 3.1 power supply delivering 550 W with 80 Plus Gold efficiency, 100% Japanese capacitors, a 135 mm FDB fan with zero RPM mode and comprehensive protection

  • Max wattage550 W
  • Modular cablingFull Modular
  • Efficiency certification80 PLUS GOLD Certified
  • Product colorSilver
  • Product typeATX 3.1
  • Product dimensions5.52 × 5.91 × 3.39 in

Model Century ll 550W

  • ATX 3.1 ready for modern platforms
  • 80 Plus Gold certification reduces energy waste
  • 100% Japanese capacitors ensure stable long-term operation
  • 135mm FDB fan with zero RPM mode keeps noise low
  • Fully modular flat cables simplify cable management

Ready for modern platforms

The Montech Century II 550W is an ATX 3.1 power supply built for systems that demand stable delivery at 550 W. Full modular cabling keeps the interior tidy and lets builders connect only what they need.

Thermals and acoustics

A 135 mm fluid-dynamic-bearing fan spins only when load demands it, thanks to a zero-RPM mode that eliminates noise at idle. 80 Plus Gold certification confirms high efficiency, reducing waste heat and overall power draw during typical use.

Cabling and protection suite

Flat, flexible cables route cleanly through tight channels and simplify future upgrades. The unit includes OCP, OVP, UVP, SCP, OTP and OPP safeguards, all backed by a ten-year coverage period.

How it compares

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

Price $49.99
Cheaper than about 91% of the 10,869 comparable items (median $142.99).
Max wattage 550 W
Lower than about 82% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameMontech
Model nameCentury II 550 W
Part numberCenturyll550w
Product colorSilver
Product typeATX 3.1
Power
Max wattage550 W
Modular cablingFull Modular
Efficiency certification80 PLUS GOLD Certified
Size & build
Product dimensions5.52 × 5.91 × 3.39 in
Product weight5.29 lb (2.4 kg)
Shipping weight2.09 kg
Package size300 × 211 × 109 mm

Other versions of this model

5 more in the same range

Questions about this item

Will the fully modular cables reach all connectors in a standard ATX mid-tower case?

The unit ships with flat, fully modular cables designed for tidy routing in typical ATX mid-tower layouts; measure your longest run against the included lengths to confirm.

Does the 135 mm fan stay off during light office workloads?

The zero-RPM mode stops the fan completely at low load, so silent operation is maintained during everyday tasks.

What protections guard the system if a rail spikes or shorts?

Built-in OCP, OVP, UVP, SCP, OTP and OPP circuits shut the supply down instantly on over-current, over-voltage, under-voltage, short-circuit or over-temperature events.

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