Component Analysis

Before reading this page, we strongly suggest looking at this article, which will help you better understand the insides of a PSU.



The PCB is tiny for a 1000 W unit. Compared to the Seasonic Focus Plus Gold platform, this one has several changes, of which the most important is the MCU responsible for the PSU's firmware OPP EVGA states shuts the PSU down when over-power conditions persist for more than 1 ms. In other words, firmware OPP reacts slower than hardware OPP.


The transient/EMI filter stages have all the necessary parts, offering good EMI suppression.


A Metal Oxide Varistor (MOV) handles voltage surges, while an NTC thermistor and relay combination suppresses large inrush currents. The NTC thermistor is covered in heat shrink, which I had to remove for its identification.


The bridge rectifiers are bolted to a leaning heatsink.


The APFC converter uses two Infineon FETs and a single STMicroelectronics boost diode. The bulk caps are by Chemi-Con, and their combined total capacity is 940 uF.


The APFC controller is a Champion CM6500UN.


The main FETs are four Infineon IPA60R190P6 installed in a full-bridge topology. The resonant controller is a Champion CU6901V.


The unit's main transformer isolates the primary from the secondary side and also lowers the voltage.


The FETs regulating the +12 V rail are installed on the solder side of the main PCB.


Two DC-DC converters generate the minor rails. They use six 6x 40030L FETs, and their joint PWM controller is by Anpec.


All caps, both electrolytic and polymer, are provided by good manufacturers.

The 5VSB circuit uses an MCC MBR1045ULPS SBR on its secondary side. The standby PWM controller is an EM8569C.


The supervisor IC is a Weltrend WT7527RA providing the essential protection features, including hardware OPP. There is also a Weltrend WT51F104 for firmware OPP, which also controls the fan's speed.


Many polymer caps are installed on the face of the modular PCB.


Soldering quality is good.


The cooling fan is by Hong Hua, and its model number is HA13525H12F-Z. It uses a fluid dynamic bearing, which means it will last for a while, and its noise output is lower than a double ball-bearing fan with similar specifications.