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Black ATX power supply unit with 120mm cooling fan and standard cable bundle

E-POWER

E-POWER EP-550PM 550W ATX/EPS12V power supply 120mm fan

SKU CH-C4J8-4AKQM MPN EP-550PM

Delivers 550 W through a 120 mm fan-cooled ATX/EPS12V unit with 20+4 pin, 4+4 pin, two PCI-E 6+2 pin and six SATA connectors

  • ColorBlack
  • TypeATX 12V / EPS 12V
  • Maximum Power550 W
  • Fans1
  • Main Connector20+4 Pin
  • +12V Rails2
  • Delivers 550 W for stable system operation
  • 120 mm fan provides quiet cooling airflow
  • Dual +12 V rails balance load across components
  • Two PCI-E 6+2 pin connectors power modern graphics cards
  • Six SATA connectors support multiple storage drives

550W ATX/EPS12V supply for standard builds

The E-POWER EP-550PM delivers 550 W through dual +12 V rails and a 120 mm fan. It fits ATX and EPS12V systems that need a 20+4 pin main connector, a 4+4 pin CPU connector, two PCI-E 6+2 pin connectors, six SATA connectors, six Molex connectors and one FDD connector. The non-modular design keeps cabling simple for first-time builders.

Replaces older units below 550 W

Upgrading makes sense when a current supply cannot feed a mid-range graphics card or when a system restarts under load. The dual +12 V layout spreads current more evenly than many legacy single-rail units. Efficiency sits above 75 percent, so the jump is worth it for builds that run near the 550 W ceiling for extended periods.

Straightforward ATX installation with fixed cables

Mount the 150 x 140 x 86 mm chassis with four standard screws and connect the 24 pin, 4+4 pin and PCI-E leads directly. The fixed cable bundle cannot be reduced, so route unused Molex and FDD leads behind the motherboard tray. Verify that the 140 mm depth clears your case before fitting.

Highlights

  • Delivers 550 W for stable system operation
  • 120 mm fan provides quiet cooling airflow
  • Dual +12 V rails balance load across components
  • Two PCI-E 6+2 pin connectors power modern graphics cards
  • Six SATA connectors support multiple storage drives

Specifications

BrandePOWER
SeriesPM
ModelEP-550PM
ColorBlack
TypeATX 12V / EPS 12V
Maximum Power550 W
Fans1
Main Connector20+4 Pin
+12V Rails2
PCI-Express Connector2 x 6+2 Pin
SATA Power Connector6
Max PSU Length140 mm
ModularNo
Efficiency> 75%
Input Voltage115 / 230 V
Input Frequency Range50/60 Hz
Connectors1 x 24 pin (20+4) ATX
Power Rating550W
Dimensions150 x 140 x 86 mm
Weight4
Input Current8A @ 115V, 4A @ 230V
+3.3V Max. Current24A
+5V Max. Current24A
+12V1 Max. Current20A
+12V2 Max. Current20A
-12V Max. Current0.5A
+5VSB Max. Current2.5A
12V Power Connector1 x 4+4 Pin ATX/EPS 12V
Floppy Connector1
Peripheral Connector6
Fans Total Quantity1
Top Fans Size120mm

Questions about this item

Will the 140 mm length fit inside my case?

The unit measures 150 mm deep by 140 mm wide by 86 mm high. Check your case clearance for those dimensions before buying.

Does it provide enough PCIe power for a mid-range graphics card?

Two 6+2 pin PCIe connectors are included, each capable of delivering up to 150 W on the 12 V rails.

Is the main motherboard connector compatible with both 20 pin and 24 pin sockets?

Yes, the 20+4 pin design splits to fit either legacy 20 pin or modern 24 pin ATX headers.

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