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The be quiet! fan is mounted to a bracket system underneath the top grille. Most PSU designs have the fan mounted to the top panel.
Quite an unusual mounting system, I don't think I have ever seen this implemented before.
be quiet! are using one of the Pure Wings 3 fans, model BQ PUW3-14025-HR rated 12V, 0.42A with a maximum rotational speed of 2,100 rpm. This is not one of the more commonly known base model (1,200 rpm) or high speed (1,800 rpm) fans and is designed specifically for these power supplies. This is a rifle bearing fan which tend to be not as durable or quiet as more expensive fluid dynamic bearing fans. It's a little disappointing to see to be honest. The motor in this fan is a 4-pole fan motor. MTBF is rated at 100,000 hours.
This unit is a HEC OEM design in cooperation with be quiet!. The design adopts an LLC topology (LLC+SR+DC/DC). Soldering quality, PCB design and implementation of components through the board design is excellent. I am very disappointed, however, to see that be quiet! and HEC have adopted Chinese Teapo capacitors in this design, but at least they are 105C-rated. Both primary caps are also Teapo, rated 400V 470uF at 105C.
I don't know the current status of Teapo capacitors compared to leading caps from well-regarded Japanese brands such as Nippon Chemi Con – they may have improved in recent years. Still, for adoption into a 1200W Platinum unit priced at £200 in the United Kingdom, I am disappointed.
The Power Zone 2 ships with OTP, OCP, OPP, SCP, OVP, UVP and SIP protections.
