Delivery and Specifications

Delivery
Cable	Length
1 x ATX 24 pin	60 cm
1 x EPS/ATX 12V 4+4 pin	65 cm
2 x PCI-E 6+2 pin	60 cm
1 x 4 SATA	62 cm (39 cm - 11.5 cm - 11.5 cm)
1 x 2 SATA	41.5 cm (30 cm - 11.5 cm)
1 x 4 4-pin Molex	66 cm (41 cm - 12.5 cm - 12.5 cm)
1 x 2 4-pin Molex	43 cm (30.5 cm - 11.5 cm)
1 x Floppy-Adaptor	10 cm

The delivery found with the Seasonic Platinum Series Fanless 520 W is good. In its watt-class the Platinum Series Fanless 520 W comes with plenty of cables and it allows you to wire a system accordingly. Of course, from a 520 Watts PSU you don't have to expect, that there are more than two PCI-E 6+2 Pin power cords, since this PSU is not recommended to use with an SLI or CrossFire setup. If you start looking for SATA and Molex connectors you find a total of six connectors each. All cables are long enough to easily wire a system.

Specifications
Voltage	Current	Power
+ 3.3 V	20 A	100 Watt	520 Watt (Total)
+ 5.0 V	20 A
+ 12 V1	43 A	516 Watt
- 12 V	0.5 A	6 Watt
+ 5 Vsb	2.5 A	12.5 Watt

The Platinum Series Fanless power supply with 520 Watts has been 80Plus Platinum certified, which means that this PSU is able to reach a maximum efficiency of more than 92 percent. Furthermore this PSU complies with ErP guidelines (Energy Rated Product) and therefore it consumes less than 1 Watt when an attached system is powered off or in standby.

Comparing this unit to it's "predecessor", the X-460FL shows that there are some grave differences, like for example the fact this PSU is with full bridge topology on the primary side. Furthermore the MOSFETs for the 12 volt regulation aren't on the main PCB, their on a daughter PCB instead. Therefore a more efficient heat dissipation is possible. Furthermore also on the primary side, there is a LLC resonance controller, which helps improving the efficiency. On the secondary side there is a synchronous design for the DC-DC converters on the modular PCB. The DC-DC converters are very close to the modular connectors, which has the advantage that no wires are needed.

Right behind the AC receptacle there is a small PCB, which has been covered by a metal shield to reduce EMI emissions. There are four Y caps, one CM choke, and a single X cap on this small PCB. You'll also find two more CM chokes, two pair X and Y caps and a MOV on the main PCB. An additional NTC thermistor is taking care of high inrush currents. One step further into the power supply we find a ICE2QR4765 PWM controller. Another step onto it there are two parallel bridge rectifiers GBJ2506.

A closer look at the hold-up cap shows that it's from Hitachi and it's rated at 330 uF at 420 volt and 105°C. Looking for the APFC controller shows it on a small daughter board, which can be found close to this PSU's primary heatsink. There are also four IPP50R250CP from Infineon, which have been arranged in a full-bridge topology. There is even another LLC resonance converter, which again helps improving efficiency. On the daughter board, where there are the modular connectors you can also find Nippon Chemi-Con electrolytic caps as well as additional rubycon caps.

Page 1 - Introduction	Page 6 - Performance 50 % load
Page 2 - Preview	Page 7 - Performance 100 % load
Page 3 - Delivery/Specs	Page 8 - Average Values
Page 4 - Test setup	Page 9 - Conclusion
Page 5 - Performance 20 % load

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