Deepcool PL550D: ATX v3.1 (almost) PSU at €49!

The Deepcool PL550D costs 49 euros, making it the most affordable ATX v3.1 PSU of toda’y market. This price is dead low even for previous ATX generation PSUs. Although its max power is restricted to 550W, this unit can withstand power spikes up to 1100W! 

The Deepcool PL550D will be included in my best ATX v3.x & PCIe 5.x PSU picks article once they make some minor changes in its platform.

I have evaluated so far the following Deepcool PSUs:

Deepcool is the first to offer highly affordable ATX v3.1 PSUs through its PL-D series. I have already evaluated the PL800D, PL750D, and PL650D, and they all perform decently, given their price tags. It is not easy for an older design to output 200% of its max power to be compatible with the requirements of the PCIe 5.1 CEM, but Helly Technology achieved that. The PL-D line consists of four members, with capacities ranging from 550W to 800W. In this review, I will evaluate the smallest member of the line.

Technical Specifications:
  • Manufacturer (OEM): Helly Technology
  • Max Power: 550W
  • Cybenetics Efficiency: [115V] Cybenetics Silver (85-87%) [230V] Cybenetics Silver (87-89%)
  • Noise: Cybenetics Standard++ (30-35 dB[A])
  • Compliance: ATX v3.1, EPS 2.92
  • Operating Temperature (Continuous Full Load): 0 – 40 °C
  • Alternative Low Power Mode support: Yes
  • Power 12V combined: 549.6W
  • Number of 12V rails: 1
  • Power 5V + 3.3v: 100W
  • Power 5VSB: 15W
  • Cooling: 120mm Hydraulic Bearing Fan (W12025HZ12SEMA)
  • Semi-Passive Operation: ✗
  • Modular Design: ✗
  • High Power Connectors: 2x EPS (1x cables), 3x PCIe 6+2 pin (2x cables), 1x PCIe 12+2 pin (600W)
  • Peripheral Connectors: 8x SATA (2x cables), 2x 4-pin Molex (2x cables)
  • ATX Cable Length: 560mm
  • EPS Cable Length: 735mm
  • 6+2 pin PCIe Cable Length: 580mm
  • 12+4 pin PCIe Cable Length: 590mm
  • Distance between SATA / 4-pin Molex: 105/100mm
  • In-cable capacitors: No
  • Dimensions (W x H x D): 150 mm x 85 mm x 140mm
  • Weight: 1.72 kg (3.79 lb)
  • Warranty: five years
  • Street price (excluding VAT): €49

Power Specifications

Rail 3.3V 5V 12V 5VSB -12V
Max. Power Amps 20 20 45.8 3 0.3
Watts 100 549.6 15 3.6
Total Max. Power (W) 550
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