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Rectangular steel PSU with perforated vents, 120mm fan, semi-modular cables, bronze efficiency badge

Rosewill

Rosewill VSB650 650W 80+ Bronze semi-modular power supply

SKU CH-7XBK-54D8P MPN VSB650

A 650 W ATX 3.1 semi-modular unit with an 80 PLUS Bronze rating, a 120 mm fan, a 12V-2x6 connector and a 140 mm compact chassis

  • Max wattage650 W
  • Power efficiencyUp to 85%
  • Modular cablingSemi-Modular
  • Fan configuration1 × 120 mm
  • Power factor correctionActive
  • Main power connector20+4Pin

Model ATX 3.1 80+ Bronze (650W)

  • Ready for latest builds with ATX 3.0 and 3.1 compatibility
  • Clean cable routing thanks to semi-modular design and 80 PLUS Bronze efficiency
  • Powers next-gen graphics cards via native 12V-2x6 PCIe 5.1 connector
  • Fits compact cases with 140 mm depth and 35% smaller chassis
  • Reliable cooling from 120 mm ICB fan and Japanese 105°C capacitor

Compact 650 W ATX 3.1 unit

The Rosewill VSB650 is a 650 W semi-modular power supply built to the ATX 3.1 standard. Its 140 mm chassis fits small-form-factor cases while delivering a single +12 V rail rated for the full 650 W. Builders upgrading to PCIe 5.1 graphics cards get a native 12V-2x6 connector rated for 450 W direct GPU power. The 80 PLUS Bronze design reaches up to 85 % efficiency at typical loads.

Replaces older ATX 2.x supplies

Moving from an ATX 2.x unit adds the 12V-2x6 cable and the 3.1 transient-response profile required by modern GPUs. The jump is worth it when the new graphics card specifies a native 12+4 pin connection or when the old supply cannot sustain the 235 % total power excursion spec. The semi-modular layout keeps cable count low in tight builds. Hold-up time is 16 ms minimum.

Steady output under sustained load

A 120 mm ICB silent fan and a steel shell with large vents manage thermals during long sessions. The 105 °C Japanese capacitor maintains rated output at high internal temperatures. Six protection circuits — OCP, OPP, OTP, OVP, SCP and UCP — engage without interrupting delivery. The single-rail design keeps +12 V voltage stable across the full 650 W range.

How it compares

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

Price $48.99
Cheaper than about 91% of the 10,869 comparable items (median $142.99).
Max wattage 650 W
Lower than about 70% of the 930 comparable items (median 850 W).

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Specifications

Product
Brand nameRosewill
Model nameVSB650
Product typeATX 3.1 Compatible
Graphics
CrossFire supportReady
Ports & slots
SATA power connectors6
Output type+3.3 V@18A, +5 V@18A, +5VSB@3A
Power
Max wattage650 W
Power efficiencyUp to 85%
Modular cablingSemi-Modular
Power factor correctionActive
Main power connector20+4Pin
12V railsSingle
Power hold-up time16 ms min.
Efficiency certification80 PLUS BRONZE Certified
Overvoltage protectionYes
Overload protectionYes
Size & build
Shipping weight2.06 kg
Package size267 × 203 × 112 mm
Compatibility
PSU length limit140 mm
More details
Fan configuration1 × 120 mm

Other versions of this model

2 more in the same range

Questions about this item

Will the 140 mm length fit my small-form-factor case?

The chassis measures 140 mm long by 150 mm wide by 86 mm high, so verify your case clearance against those dimensions before ordering.

Which cables must I connect during installation and which can stay in the box?

The 20+4-pin main and both 4+4-pin EPS cables are permanently attached; plug the 12V-2x6, the two 6+2-pin PCIe, the six SATA and the three peripheral cables only if your build needs them.

When should I plan to replace the 120 mm fan?

The ICB fan uses a 105 °C rated Japanese capacitor; under normal loads expect several years of service, but replace it if bearing noise appears or airflow drops noticeably.

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