Enermax Revolution87+ 850W PSU Review
Enermax is using their proprietary 139mm fans inside the Revolution87+ units. The "twister" fan features a unique magnetic self-lubricating ball bearing design which allegedly offers greater reliability and lower noise.
As we mentioned in the introduction of this article, Enermax designs and manufactures their own products, thus there is no OEM behind the creation of the Revolution87+. The base design of the Revolution87+ is familiar to us as Enermax has been using it for quite some time now, constantly improving it on every revision of their products. Three average heatsinks can be seen housing the three stages of the unit; PFC, primary inverter and secondary converter.
The filtering stage begins on a small PCB attached on the back of the A/C receptacle, with four Y-type capacitors, two X-type capacitors and two filtering coils. As if those were not enough, another coil and a surge suppressing MOV have been installed onto the main PCB of the unit, creating an excellent filtering stage.
Two major heatsinks can be seen to the left side of the main PCB. The leftmost heatsink houses the APFC components, two chopping transistors and a diode. Two 390μF/400V capacitors from Matsushita (Panasonic) and a large coil complete the PFC circuit. The second heatsink holds the primary stage transistors, used to control the voltage fed to the input of the transformer.
On the secondary side of the unit, we can see the heatsink housing the four transistors of the synchronous converter. Only a 12V line is being generated and the minor lines are being converted via DC to DC circuits, which enhance the unit's efficiency. Most capacitors at the secondary side of the unit are solid-state from Enesol but there are a few electrolytic by Nippon Chemi-Con as well.