Seasonic M12II-520 EVO 80+ Bronze Modular Power Supply, 520W

MX75573 M12II-520 EVO 80+ Bronze Modular Power Supply, 520W
MX75573 M12II-520 EVO 80+ Bronze Modular Power Supply, 520W MX75573 M12II-520 EVO 80+ Bronze Modular Power Supply, 520W MX75573 M12II-520 EVO 80+ Bronze Modular Power Supply, 520W MX75573 M12II-520 EVO 80+ Bronze Modular Power Supply, 520W

Product Info

M12II-520 EVO Modular Power Supply Unit

The M12II EVO series is an upgraded Seasonic product family that supports Intel's fourth generation of core processors and provides reliable performance for enthusiast seeking 80 PLUS® Bronze efficiency. The main features of the M12II EVO series units at a glance are fully modular flat black cables, highly reliable 105°C aluminum electrolytic capacitors, Smart and Silent Fan Control technology (S2FC), ample +12 V output and Seasonic's 5-year worldwide manufacturer's warranty.

This is a very popular power supply amongst system builders of all types. One of its special features is the fan control system, which is constantly monitoring the power usage and the ambient temperatures to decide what the most efficient fan rotation speed is in order to provide the lowest possible operational noise levels. The fully modular cable design is the perfect solution for those who want to reduce the number of unnecessary cables inside the case. Ample +12 volt outputs and high reliability capacitors make sure that this unit will be supplying pure power for a really long time.

  • 520W +12V Rails
  • 80 PLUS Bronze rating
  • Highly reliable 105°C Aluminum Electrolytic capacitors
  • S2FC - Smart and Silent Fan Control
  • 120mm Fluid Dynamic Bearing (FDB) cooling fan
  • Multi-GPU technology support
  • Fully modular cables
  • Flat black cables
  • Over power protection (OPP), Over voltage protection (OVP), Short circuit protection (SCP), Under-voltage protection (UVP)


80 PLUS® Bronze

The 80 PLUS® Bronze certification indicates that a high percentage of the electricity is converted into useful power, therefore there is less heat lost and more money saved on the electricity bill. The 80 PLUS® Bronze certification guarantees greater than 82%, 85% and 82% efficiency at 20%, 50% and 100% operating loads, respectively. Seasonic's Bronze Series is an economical choice with great performance and high built-in value.

Fully Modular Cables

In Seasonic's patented design feature full modularity comes hand-in-hand with the extensive use of SMD technology to increase the overall performance and reliability of this power supply. The simple and inventive layout scheme helps to attain unsurpassed quality and performance, where efficiency is further enhanced by minimized line resistance, reduced voltage drop and lower impedance. Reduced component count and better space utilization facilitate optimal air flow inside the case and promote heat dissipation, proper cooling and ultimately longer product life.

Fluid Dynamic Fan Bearing

High performance Fluid Dynamic Bearing (FDB) fans are designed to take advantage of the impact absorbance effects of oil. They are extremely reliable and generate considerably less operating noise and heat than ball bearing fans. The lubrication of the bearing surface reduces friction and vibration and therefore lowers overall power consumption. Due to the effortless, quieter rotations and its robust construction, this reliable fan technology also greatly increases the lifespan of the fan.


How It Works

When the fan shaft rotates, high pressure oil drifts along the grooves of the bearing sleeve to generate a thin layer of lubrication between the bearing faces. As the speed increases, so does dynamic oil pressure and the shaft is lifted from the bearing to create smooth, effortless rotations. The herringbone shape of the groves helps to efficiently channel the lubricant and avert leakage.


The intelligent thermal circuit feature is designed to find the optimal balance between the necessity to cool the components and the need to run the power supply in the most silent manner possible.


105°C Japanese Capacitor

Premium quality Japanese capacitors with 105°C rating increase overall reliability and extend product life.

Ample +12 V Output

Enhanced +12 V current capability broadens utilization possibilities.

Multi-GPU Setup

Our power supplies are equipped with 6-pin and 8-pin PCI-E connectors to support all GPU platforms.

5-year Warranty

This product is also covered by an exceptional 5 Year Manufacturer Limited Warranty.

Protection Designs

  • OPP (Over Power Protection)
  • OVP (Over Voltage Protection)
  • SCP (Short Circuit Protection)
  • UVP (Under Voltage Protection)


Product 520W 80 Plus Bronze Power Supply Unit
Part Number M12II520 BRONZE
Form Factor Intel® ATX 12V
Input Voltage 100 ~ 240 VAC
Input Frequency Range 50 ~ 60 Hz
Input Current 4.5~9A
Efficiency ~82% @ 100% load
Maximum Load
Voltage +3.3V +5V +12V1 -12V +5Vsb
Current 24A 24A 40A 0.8A 2.5A
Combined Wattage 130W 480W 9.6W 12.5W
Total Wattage 520W @ 40° C
Total Combined Output 520W
80 PLUS® 80 Plus Bronze
Power Factor Correction Active PFC up to 99%
Protection Over power protection (OPP)
Over voltage protection (OVP)
Short circuit protection (SCP)
Under-voltage protection (UVP)
Cooling 1 x 120mm Fluid Dynamic Bearing fan
Noise Level N/A
MTBF (Fan) 50,000 hours at 40°C, 15%~65% R.H.
Power Good Signal N/A
Hold Up Time N/A
Active PFC Yes
Connectors 1 x Motherboard 20+4 Pin connector
1 x CPU 12V 4+4 Pin connector
2 x PCI-e 6+2 Pin connectors
6 x SATA connectors
5 x 4-Pin Peripheral connectors
1 x 4-Pin Floppy connector
Modular Cable Type Yes, Fully modular
MTBF 100,000 hours @ 25°C
Safety Approvals cTUVus, TUV, Gost-R, UkrTEST, CB , BSMI, CCC, Semko, CE, FCC, C-tick
Compliance Energy Star, RoHS, WEEE, ErP Lot 6, REACH
Dimensions (WxLxH) 150 x 160 x 86 mm
Weight N/A

Package Contents

  • Seasonic M12II-520 EVO 80+ Bronze 520W Modular Power Supply
  • Power Cables
  • Cable Ties
  • User's Manual