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Black rectangular ATX power supply with fixed flat ribbon cables visible

Super Flower

Super Flower SF-550C12DB 550 W 80 PLUS Bronze non-modular power supply

SKU CH-75CW-HQVKH MPN SF-550C12DB

550 W ATX power supply with 80 PLUS Bronze efficiency, single +12 V rail, four SATA connectors and fixed ribbon cables

  • Max wattage550 W
  • Power efficiency> 85%
  • Modular cablingNon-Modular
  • Power factor correctionActive
  • Main power connector20+4Pin
  • 12V railsSingle

Model ATX 2.0 Bronze (550W) Black

  • 80 PLUS Bronze certified for >85% typical efficiency at 50% load
  • Single +12V rail delivers the full 550 W to demanding components
  • Flat ribbon cables on a fixed layout simplify routing in tight cases
  • Active PFC with 100–240 V auto-switching ensures stable input worldwide
  • Over-voltage and overload protection guards hardware against power anomalies

550 W ATX power supply for entry builds

The Super Flower SF-550C12DB delivers 550 W of continuous power through a single +12 V rail and meets 80 PLUS Bronze efficiency at 82%, 85% and 82% across typical loads. Active PFC handles 100-240 V input automatically, making it suitable for standard desktop configurations that do not require modular cabling.

Fixed ribbon cables simplify routing

All output cables are flat ribbons rather than round bundles, which bend easily around tight corners and reduce clutter behind the motherboard tray. The non-modular design means every lead is present from the start, so builders do not need to manage spare cables but must plan space for the full loom.

Compact 140 mm depth fits small cases

At 140 mm long the unit leaves clearance in shallow chassis while still providing a 20+4 pin main connector, four SATA power plugs and the usual peripheral leads. Over-voltage and overload protection circuits guard connected components, and the fixed-cable layout keeps the internal profile predictable for first-time assemblers.

How it compares

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

Price $51.99
Cheaper than about 90% 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 nameSuper Flower
Model nameSF-550C12DB
Product typeATX12 V / EPS12 V
Ports & slots
SATA power connectors4
Power
Max wattage550 W
Power efficiency> 85%
Modular cablingNon-Modular
Power factor correctionActive
Main power connector20+4Pin
12V railsSingle
Efficiency certification80 PLUS BRONZE Certified
Overvoltage protectionYes
Overload protectionYes
Supply voltage100–240 V
AC input frequency50/60 Hz
Size & build
Shipping weight2.13 kg
Package size300 × 203 × 117 mm
Compatibility
PSU length limit140 mm

Other versions of this model

3 more in the same range

Questions about this item

What cables are fixed to the SF-550C12DB and will any of them need replacement later?

All cables are permanently attached ribbon types; the four SATA power connectors and 20+4-pin main connector cannot be swapped individually, so a damaged cable means replacing the entire unit.

Which protection limit activates first during sustained heavy load on the 550 W unit?

Overload protection will trip if total draw exceeds 550 W, while over-voltage protection guards each rail; the lower threshold reached first depends on the specific load profile.

How much heat and fan noise should I expect when the PSU runs all day at typical loads?

At 50 percent load efficiency reaches 85 percent, so roughly one-seventh of input power becomes heat; the fan speed ramps with internal temperature, staying quieter at lighter loads.

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