Quiet! Known for its pursuit of excellence in PC components, it specializes in products that emphasize silence and performance. The brand’s extensive product lineup includes high-quality power supply units (PSUs), cases and cooling solutions, including air coolers and liquid coolers. Quiet! It is particularly known for trying to achieve quiet operation in all of its products, making it a favorite among PC enthusiasts who prioritize a noise-free computing environment. The brand’s product portfolio reflects a commitment to meeting the diverse needs of tech enthusiasts and professionals, with a range of products emphasizing noise reduction and efficiency.
This review focuses on “Quiet!” “superior. The Pure Power 12 M 650W PSU is the leader in Be Quiet!’s power supply range and reflects the company’s approach to product design. The Pure Power 12 M Series is designed to deliver reliable performance and quiet operation, meeting the needs of users who require a good balance between power efficiency and acoustics, as well as reliability and value. In particular, this model strives to offer a convincing combination of performance and quality, making it an attractive option for individuals looking for a PSU that meets the requirements of entry-level and advanced PC builds.
| Quiet! Pure power 12M 650W Power Specifications (Rated @ 40 °C) |
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| rail | +3.3V | +5V | +12V1 | +12V2 | +5Vsb | -12V |
| maximum output | 20A | 20A | 32A | 28A | 3A | 0.3A |
| 120W | 650W | 15W | 3.6W | |||
| all | 650W | |||||
| 80PLUS Rating | gold | |||||
| AC input | 100 – 240 VAC, 50 – 60 Hz | |||||
| Suggested retail price | $99 | |||||
packaging and bundling
The Pure Power 12 M 650W PSU comes in an elegantly designed packaging with a predominantly black color scheme and an image of the PSU itself on the front. This sturdy cardboard packaging comes with a nylon bag and foam padding to provide excellent protection for the device during shipping. Specs and details about the PSU’s performance are printed on the back of the box.
Consistent with Be Quiet!’s simplified approach, this package contains only the essentials for PSU setup and use. Unboxing reveals a series of mounting screws and AC power cord. The Pure Power 12 M 650W boasts a fully modular configuration that allows each DC power cord to be detached, including the 24-pin ATX connector.
These cables are uniformly black from connectors to wires and feature mostly flat ribbon designs for easier cable management, with the notable exceptions being the sleeved 24-pin ATX and 12VHPWR cables, the latter of which are specifically designed to handle up to 450 Watts of power. Oddly, there are two CPU 12V connectors, but one of them is limited to the 4P connector.
| Quiet! Pure power 12M 650W | ||
| Connector type | hardwired | Modular |
| ATX 24-pin | – | 1 |
| EPS 8 pin | – | 1 |
| P4 4 pin | – | 1 |
| PCIe 5.0 | – | 1 |
| PCI-E 8-pin | – | 2 |
| SATA | – | 5 |
| Molex | – | 2 |
| floppy disk | – | – |
Quiet!Pure power 12M 650W power supply
Exterior
Quiet! The Pure Power 12 M 650W PSU is packaged in a chassis that measures 86 mm × 150 mm × 160 mm (H × W × D), slightly exceeding the standard ATX specifications. This design ensures that the PSU fits seamlessly into a variety of modern PC cases, especially those tailored for high-performance components. Still, while its dimensions are typical for high-performance products, it could be significantly shorter given its cooling fans and power output.
Quiet! There’s a lot of emphasis on the Pure Power 12 M 650W’s external design, which is an odd choice for a product that’s primarily designed to compete on value. The unit features a slightly textured black finish, with the company logo subtly embossed on the right side of the chassis, giving it an elegant feel. The fan finger guard features a sleek, discrete parallel line design. An information sticker detailing the PSU’s certifications and specifications is neatly placed on the left side, while the top remains plain.
At the back, a standard switch sits near the AC outlet, with a small decorative sticker next to it. Modular cable connectors take up most of the front of the unit, and each connector is labeled with a clear white legend for easy identification. Notably, the Pure Power 12 M 650W includes a 12VHPWR connector, demonstrating compliance with the ATX 3.0 specification, making it one of the very few ATX 3.0 compliant devices with such a low power output.
interior design
Quiet! The Pure Power 12 M 650W PSU comes with a cooling fan of their own design, as well as that of an unknown OEM to us, with an all-black design and a rifle-bearing engine for durability and efficiency. The design of the PSU allows for the inclusion of larger fans, but a 120mm model has been selected for installation within the unit. The fan operates at a maximum speed of 1800 RPM, which is a pretty high top speed for a 120mm fan responsible for cooling a 650W device.
The Pure Power 12 M 650W PSU is manufactured by HEC/Compucase, an OEM known for producing power supply units across various segments of the market. While HEC/Compucase may not be widely recognized among the top PSU vendors, it is one of the oldest and most experienced companies in PC power supplies and has an excellent reputation in the industry for quality and reliability.
Pure Power 12 M 650W is designed with a proven, reliable topology that reflects a focus on delivering value and reliability. The PSU’s filtering stage is located at the AC outlet’s entry point and consists of three Y capacitors, two X capacitors, and two large filter inductors, followed by a rectifier bridge connected to its dedicated heat sink. The active power factor correction (APFC) component is placed on a significant heat sink at the edge of the PCB and features two APFC MOSFETs (Infineon 6R190P6) and a diode, as well as a closed filter inductor and two Teapo capacitors (430 μF each ).
For the primary, the PSU uses a half-bridge LLC topology placed on a large dedicated heatsink, which is a very typical configuration in modern mid-range PSUs. On the secondary side, four Onsemi 5C430N transistors on a vertical daughter board generate the 12V line, while the 3.3V and 5V lines are generated via a DC-to-DC conversion circuit on another daughter board. This modular approach to circuit design helps maintain a clean layout.
The secondary-side capacitors are a combination of Teapo and Nippon Chemi-Con, providing a balance between cost-effectiveness and reliability. This component selection reflects a strategic approach to maintaining high quality standards while taking into account production costs.
