We would like to thank be quiet! for supplying the review sample.
The be quiet! Pure Power 11 FM (Fully Modular) line lists three models of different capacities: 550 W, 650 W, and 750 W. In a previous review, I evaluated the strongest model of the line, and in today's review, we will take a look at the 650 W variant. The 650 W Gold competition includes the new Corsair RM650x (2021) with the Magnetic Levitation fan, XPG Core Reactor 650, and Seasonic GX-650. The Super Flower Leadex III Gold is also a strong competitor, but the Leadex V has replaced the line. Unfortunately, Super Flower hasn't sent me any Leadex V samples thus far.
All Pure Power 11 FM (Fully Modular) units are made by CWT, while the other non-modular and semi-modular Pure Power units use FSP platforms. This new CWT platform is only available to be quiet!. It is also a top performer that doesn't cost a bomb, which has the new Pure Power models achieve high performance-to-price ratios.
The 650 W Pure Power FM unit is fully compliant with the ATX12V v2.52 specification, so it is very efficient under incredibly light and light loads. On top of that, it is compatible with Microsoft's Modern Standby mode if you find a compatible mainboard. Its cooling is handled by a 120 mm SilentWings fan driven by a highly relaxed fan-speed profile. Lastly, it is rated for up to 40°C continuous full-power delivery.
|Features & Specifications|
|Max. DC Output||650 W|
|Efficiency||80 PLUS Gold, Cybenetics Gold|
|Noise||Cybenetics A (20–25 dBA)|
|Intel C6/C7 Power State Support||Yes|
|Operating Temperature||0–40 °C|
|Protections||Over Voltage Protection|
Under Voltage Protection
Over Power Protection
Over Temperature Protection
Over Current Protection
Short Circuit Protection
|Cooling||120mm rifle bearing fan (BQ QF2-12025-MS)|
|Dimensions (W x H x D)||150 x 85 x 160 mm|
|Weight||1.57 kg (3.46 lb)|
|Compliance||ATX12V v2.53, EPS 2.92|
|Price at Time of Review (excl. VAT)||No information available|
|Rail||3.3 V||5 V||12 V1||12 V2||5 VSB||-12 V|
|Max. Power||20 A||20 A||32 A||28 A||3 A||0.3 A|
|120 W||650 W||15 W||3.6 W|
|Total Max. Power||650 W|
|12V1||ATX, PCIe1, PCIe2, Peripheral|
|12V2||EPS, PCIe3, PCIe4|
12V2 should be stronger since it has both EPS and two PCIe connectors.