be quiet! System Power 9 CM BN303 (BN303)
 | Outdated Product A unique power supply from the German company Be quiet. The model was created in the ATX form factor and received a power of 700 W, which opens up the possibility of servicing even a powerful and performant computer system in front of the device. The circuitry is built on DC-DC converters, which guarantees extremely stable electric current parameters. Energy efficiency certified to 80 PLUS BRONZE. Among other things, this model boasts half-modular wiring. The main wires (power cables for the motherboard and CPU) of the Be quiet System Power 9 CM BN303 are non-removable, while the rest of the wiring can be used as needed. The semi-modular concept has a positive effect on the ventilation of the system unit, since unused wires will not clutter up the interior space. At the same time, the wiri...ng is long enough to use the regular cable management channels of the "system unit". The power supply received an extremely quiet fan, while the cooler is equipped with a system for automatically selecting the rotation speed of the bladed impeller, due to which the fan speed increases in proportion to the load on the power supply. The list of interfaces includes 4 PCIe connectors with a 6 + 2 pinout scheme, as well as 10 SATA. |
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A unique power supply from the German company Be quiet. The model was created in the ATX form factor and received a power of 700 W, which opens up the possibility of servicing even a powerful and performant computer system in front of the device. The circuitry is built on DC-DC converters, which guarantees extremely stable electric current parameters. Energy efficiency certified to 80 PLUS BRONZE.
Among other things, this model boasts half-modular wiring. The main wires (power cables for the motherboard and CPU) of the Be quiet System Power 9 CM BN303 are non-removable, while the rest of the wiring can be used as needed. The semi-modular concept has a positive effect on the ventilation of the system unit, since unused wires will not clutter up the interior space. At the same time, the wiring is long enough to use the regular cable management channels of the "system unit". The power supply received an extremely quiet fan, while the cooler is equipped with a system for automatically selecting the rotation speed of the bladed impeller, due to which the fan speed increases in proportion to the load on the power supply. The list of interfaces includes 4 PCIe connectors with a 6 + 2 pinout scheme, as well as 10 SATA.
The information in the model description is for reference purposes.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog be quiet! 2026 - new arrivals, bestsellers, and the most relevant models be quiet!.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog be quiet! 2026 - new arrivals, bestsellers, and the most relevant models be quiet!.
Series be quiet! System Power (available)Compare using chart →
650 W, 24+8+4 pin, 2 x 6+2 pin, 1 x 16 pin, SATA 5, Molex 1, ATX, Efficiency 89 %, warranty 5 years
750 W, 24+8+8(4+4) pin, 3 x 6+2 pin, 1 x 16 pin, SATA 6, Molex 1, ATX, Efficiency 89 %, warranty 5 years
450 W, 24+8 (4+4) pin, 2 x 6+2 pin, SATA 5, Molex 1, ATX, Efficiency 89 %, warranty 5 years
550 W, 24+8+4 pin, 2 x 6+2 pin, 1 x 16 pin, SATA 5, Molex 1, ATX, Efficiency 89 %, warranty 5 years
500 W, 24+8 (4+4) pin, 2 x 6+2 pin, SATA 6, Molex 2, ATX, Efficiency 89 %, warranty 3 years
850 W, 24+8+8(4+4) pin, 4 x 6+2 pin, SATA 6, Molex 1, ATX, Efficiency 89 %, certificate 80+ Gold, warranty 5 years
A couple of days ago, I bought this PSU, and so far, I am satisfied with it. I got it for 5300 considering bonuses on the online trade, whereas in other stores it costs around 7k. -Price -Quality of workmanship -Semi-modularity -24pin and 8pin CPU cables with black sleeving -Flat cables for the graphics card and peripherals -Quiet -Excellent circuitry, almost at the level of seasonic)) -Smell in the first day or two of use -Had difficulties connecting the 24 and 8 pin to the motherboard, as these cables are a bit stiff -Strange connection of SATA devices, as the branching goes directly from the bundle, and it's impossible to connect to the quick-release SSDs on the case, only the very last SATA, which is straight  Valeriy Elykomov: use be quiet! BN302 less than month |
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