The DIGIFANLESS 550 Watt is the first digital and fanless power supply from Enermax. Its powerful passive cooling system allows completely silent operation with 0 dB(A). State-of-the-art technologies and long-lasting quality components ensure an extremely stable and energy-saving operation with up to 93% efficiency (80PLUS® Platinum). The power supply has a digital interface for reading and controlling central power values (e.g. voltage, efficiency or temperature) via the new ZDPMS software from Enermax. The fully modular cable management with the individually sleeved cables offers the greatest possible comfort during the system build.

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550W | EDF550AWN | Fully Modular


The 80PLUS® Platinum-certified power supply achieves up to 93% efficiency at 230VAC between 20 and 100% load. This not only results in low heat generation but also reduces its own CO2 footprint.

DIGIFANLESS helps systems to meet the EU eco-design directive 2013 ErP Lot 6 and 2014 ErP Lot 3 (< 0.5W in standby mode*) due to a high-efficient 5V standby (+5Vsb) circuitry. Moreover, it supports EU regulation no. 617/2013 demanding amongst others 85% efficiency at 50% load and 82% at 20% and 100% load.

* only in combination with an ErP ready mainboard


DIGIFANLESS supplies secure and stable power thanks to two massive 12V rails with separate over-current protection (OCP). Optional the rails can be switch to single-rail operation via the ZDPMS software to run PC systems with high performance or overclocked graphics cards and CPUs.

The DC-to-DC design generates the secondary voltages (+5V and +3.3V) from the primary voltage rail (+12V). The positive effect is higher efficiency, clean output voltages (low ripple noise) and perfect voltage regulation at all loads.

The Copper Bridge Array is an innovative and patented transmission technology for direct voltage transmission to reduce the wire-resistance and to increase the efficiency. Optimized air circulation due to clear and spacious PCB design.


The black cables are individually sleeved, which gives them a high-end look. In addition, they are flatter and more flexible than conventionally sleeved cables and can therefore be laid better behind the cladding.

The fully modular cable management allows an easy system installation and cable routing and improves the air circulation inside the case.


The sophisticated passive cooling system of the DIGIFANLESS power supply guarantees a completely silent operation (0db(A)). The PSU is, therefore, the first choice for all silent PCs, multimedia stations or HTPCs.

Digital Interface

DIGIFANLESS is equipped with a digital interface to transmit and control the most essential performance values. With the ZDPMS software (“Zero-Delay Power Monitoring System”) users can easily monitor the power supply operation and customize certain functions, eg. switch between multi- or single-rail mode, fine-tune the 12V output voltage or set the trigger points for OCP/OVP warning messages. More information about the various function of the ZDPMS software you can find in the ZDPMS manual.


Intel® ATX12V v2.4, compliant with the Intel Power Supply Design Guide for Desktop Platform Form Factors Revision 1.31 April 2013.

Full support of the C6/C7 energy-saving functions of Intel® processors, first introduced with the Haswell™ generation.

Worldwide compatibility with automatic 100-240VAC input and up to 0.99 with active Power Factor Correction (PFC).

Quality & Safety

5 Years Manufacturer Warranty.

Enermax only uses high-quality components including first-class Japanese 105°C electrolytic capacitors for maximum stability and durability.

Enermax SafeGuard, multiple protection circuit that keeps the power supply and the system safe from damage by short circuit (SCP), over voltage (OVP), under voltage (UVP), over current (OCP), over temperature (OTP), over power (OPP) as well as surges and inrush current (SIP).

Non-Stop 24/7 industrial class performance at 40°C ambient temperature.


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Technical Specifications

PSU Design Multi rail/ single rail, DC-to-DC, fully modular
PSU Length 175mm
Intel® ATX12V 2.4
Non-Stop 24/7 40°C
Powder Coating
2010 ErP Lot 6
2013 ErP Lot 6
2014 ErP Lot 3
EU regulation no. 617/2013
Intel C6/C7
Fan Size
Fan Technology
Protections* SCP, OVP, UVP, OCP, OTP, OPP, SIP
Certifications EAC, CE, FCC, BSMI, CCC, C-tick
Included in the delivery PSU, AC cord, modular cables, cable bag, cable ties, CordGuard, user manual

*SCP: short circuit protection, OVP: over voltage protection, UVP: under voltage protection, OCP: over current protection, OTP: over temperature protection, OPP: over power protection, SIP: surges and inrush current protection.

Power Distribution
AC Input Voltage 110-240VAC, 50-60Hz
AC Input Current 6.0A-2.5A
DC Output
+3.3V 20A 100W
+5V 20A
+12V1 30A 540W (45A)
+12V2 30A
-12V 0.5A 6W
5Vsb 2.5A 12.5W
Peak Power 605W*
Total Power 550W


Cables & Connectors
Mainboard 24 Pin 1x
CPU 4+4 Pin 1x
PCI-E 6+2 Pin (8 Pin) 4x
[2x 45/ 60/ 75/ 90cm]
4 Pin Molex 4x
[45/ 60/ 75/ 90cm]
FDD 1x
ZDPMS Data Link 1x

Efficiency & Noise Level
10% load @ 230V Efficiency 86.25%
Noise Level 0dB(A)
20% load @ 230V Efficiency 91.47%
Noise Level 0dB(A)
50% load @ 230V Efficiency 93.76%
Noise Level 0dB(A)
100% load @ 230V Efficiency 92.35%
Power Factor 0.99
Noise Level 0dB(A)

Dealer Information
Product Dimensions 175 x 150 x 86mm
Product Weight 2 kg
Product Box Dimensions
Product Box Gross Weight
Master Carton Dimensions 363 x 530 x 2526
Master Carton Gross Weight 15.8kg
Master Carton Pieces 4
EAN-Code 4713157721631


Datasheet EN – Digifanless 550W
Manual – Digifanless 550W
Product Pictures – Digifanless 550W
ZDPSM Software – Coolergenie
ZDPSM Manual – Digifanless 550W