By: Jonathan Kwan
May 30, 2025
In the 1MORE True Wireless ANC Bluetooth earphones review I wrote back in 2020, I talked about how there are two groups of people in Calgary: Those who will argue that you will never need air conditioning at home because you only need it for two days of the year, and those who swear by one, because our summer months can get hot and an AC is necessary to maintain home comfort. As we approach the summer season, there are days that can hit well above 30c when the sun is out while maintaining temperatures close to 20c overnight. Every time someone from the first group brings up how it is so hard to sleep at night lately, I pull up the weather app on my iPhone and ask them the question, "Which two days are you specifically referring to?" Now, despite being a big fan of central AC, when I used to live at my parents' house, running it had a major tradeoff: Noise. They still have an early 2000s Lennox installed on the side yard, which meant every time it turns on, it will rumble all the living space like you are sitting next to a running washing machine. When I got married and moved out, I was at first hesitant in installing an AC unit on the side of my house due to my terrible experience with compressor noise, even though I knew modern units are much quieter. Eventually, I did install my AC on the side of my house. The model that convinced me was a side discharge unit optimized for low noise and high efficiency, compact form factor, and above all, it did not cost that much more than the cheapest model. Coincidentally, when it comes to power supplies, we often have similar wants: Low noise, high efficiency, compact, and affordable. The be quiet! Power Zone 2 750W aims to check all these boxes. Will this PSU convince you to be the next one that sits inside your chassis? Read on to find out!
Our review unit of the be quiet! Power Zone 2 750W came in a medium-sized brown corrugated cardboard box from Newegg's warehouse in Ontario, California, USA alongside the Pure Rock Pro 3 to be reviewed by Qian Chen. Using UPS Standard, everything arrived in excellent condition to us here in Calgary, Alberta, Canada for our review today.
The retail packaging of the be quiet! Power Zone 2 750W has a consistent color selection with the rest of the company's products I have seen in the past. The predominantly black color scheme is contrasted by white text. A photo of the power supply in three-quarters view occupies majority of the real estate in front. At the top right corner, you will find be quiet!'s logo. The name of the product is printed at the bottom, which is "Power Zone 2", and the 750W rating. There is also an 80 Plus Platinum and Cybenetics Platinum badge at the top left corner. More information about the brand, specifications, and certifications is found at the back of the box.
Before we move on, let us take a look at the specifications of the be quiet! Power Zone 2 750W, as obtained from the manufacturer's website:
Model: Power Zone 2 750W
Continuous power (W): 750
Peak power (W): 820
Form factor: Version 3.1
Form factor EPS 12V: Version 2.92
Topology: LLC + SR + DC/DC
Digitally controlled: -
Voltage (Vac): 100 - 240
Frequency (Hz): 50 - 60
Input current (A): 10 / 5
Power factor at 100% load: >0.98
Modern standby: ✓
Power consumption in standby (W): <0.18
Average life time (h / 25°C): >100,000
Operating temperature up to (°C): 40
The be quiet! Power Zone 2 750W's retail package can be opened by a flap along the bottom. Upon opening the box, you will find the bundle is reasonable with few extras. What you will get is the be quiet! Power Zone 2 750W itself in the middle inside some bubble wrap, modular cables on both sides, AC power cable, five standard screws, five zip ties, and product manuals in various languages.
Page Index
1. Introduction, Packaging, Specifications
2. Physical Look - Outside
3. Physical Look - Inside
4. Minor Tests and Conclusion
