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Rectangular bronze ATX power supply with 120 mm fan and cable bundle

Montech

Montech BETA 2 550W power supply

SKU CH-PDHD-GZ252 MPN BETA 2 550W

Delivers 550 W through an ATX 3.1 ready design with 80 Plus Bronze efficiency and Japanese main capacitor

  • Max wattage550 W
  • Fan configuration1 × 120 mm
  • Efficiency certification80 PLUS BRONZE Certified
  • Built-in protectionOPP, OVP, UVP, OCP, OTP, SCP
  • Connection typesM/B 20+4Pin: 1 (20+4 Pins) CPU 4+4Pin: 2 (4+4 Pins) PCIE 6+2
  • Product colorBronze

Wattage 550W

  • ATX 3.1 readiness handles 200% total and 300% GPU power spikes
  • DC-to-DC topology delivers independent rails for cleaner voltage regulation
  • Japanese main capacitor resists heat and suppresses ripple for longer life
  • 80 Plus Bronze certification reaches over 85% efficiency at typical loads
  • Six protection circuits — OPP, OVP, UVP, OCP, OTP, SCP — guard every rail

550 W ATX 3.1-ready PSU

The Montech BETA 2 550W is an ATX power supply rated for 550 W continuous output. It meets the ATX 3.1 specification and can handle 200 % total system peak wattage plus 300 % GPU power excursions. A single 120 mm fan provides cooling while the unit carries 80 PLUS Bronze certification for over 85 % typical-load efficiency.

Builders needing two CPU and two GPU connectors

This unit suits systems that require one 20+4-pin motherboard connector, two 4+4-pin CPU connectors and two 6+2-pin PCIe connectors. It also supplies four SATA and four Molex 4-pin leads. Builds that demand more than two PCIe power cables or a higher continuous wattage rating should look at a larger model.

Case depth and cable routing before ordering

The housing measures 140 x 150 x 86 mm, so confirm that your chassis can accommodate that length and width. Check that the fixed cable set reaches all component positions without strain. Verify that your motherboard uses a standard 20+4-pin socket and that the two 4+4-pin CPU headers match your board layout.

How it compares

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

Price $40.99
Cheaper than about 92% 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 nameBETA 2 550 W
Part numberBETA 2 550 W
Product colorBronze
Product typeATX
Ports & slots
Connection typesM/B 20+4Pin: 1 (20+4 Pins)
CPU 4+4Pin: 2 (4+4 Pins)
PCIE 6+2: 2 (6+2 Pins)
SATA: 4
Molex 4Pin: 4
Power
Max wattage550 W
Efficiency certification80 PLUS BRONZE Certified
Built-in protectionOPP, OVP, UVP, OCP, OTP, SCP
Size & build
Product dimensions140 × 150 × 86 mm
Shipping weight1.77 kg
Package size254 × 201 × 100 mm
More details
Fan configuration1 × 120 mm

Other versions of this model

3 more in the same range

Questions about this item

Does my motherboard need a 20+4 pin ATX socket and two 4+4 pin CPU sockets to use this 550 W unit?

Yes, the PSU includes one 20+4 pin motherboard connector and two 4+4 pin CPU connectors, so your board must provide matching sockets.

Can I keep an older graphics card that only needs a single 6-pin power connector with this supply?

The unit ships with two 6+2 pin PCIe cables; each can serve a 6-pin plug by leaving the extra 2 pins unused.

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

The built-in OPP, OVP, UVP, OCP, OTP and SCP protections will shut the unit down if voltages drift out of spec, so a successful boot and sustained load confirm correct operation.

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