be quiet! System Power 9
400 WProduct details
The be quiet! System Power 9 CM offers the reliable and quiet operation known from be quiet! and is perfectly suited for PC building. It provides a stable and reliable power supply for the CPU and GPU. The power supply is equipped with two independent 12V rails and supports graphics card configurations with two PCI-Express connectors. The DC/DC converter ensures strong voltage regulation—even under heavy cross-loads. This makes the power supply a reliable companion for the next generations of processors and graphics cards.
Form factor | ATX |
80 PLUS certificate | Bronze |
Modularity | Partially modular cable management |
Internal connection options | 15-pin S-ATA (5x), 20+4 PIN ATX power connector (1x), 4-pin floppy (1x), 4+4-pin 12V (1x), 6+2-pin PCI Express (2x) |
Item number | 11918093 |
Manufacturer | be quiet! |
Category | Power Supply PC |
Manufacturer no. | BN300 |
Release date | 24-7-2019 |
External links |
Colour | Black |
Exact colour description | Black |
Form factor | ATX |
Efficiency | 89 % |
80 PLUS certificate | Bronze |
Modularity | Partially modular cable management |
Internal connection options | 15-pin S-ATA (5x), 20+4 PIN ATX power connector (1x), 4-pin floppy (1x), 4+4-pin 12V (1x), 6+2-pin PCI Express (2x) |
Cooling method | Active cooling |
Number of fans | 1 x |
Fan diameter | 120 mm |
LED colour | without LED |
Power protection features | EIA, OCP, OPP, OTP, OVP, SCP |
Power | 400 W |
CO₂-Emission | |
Climate contribution |
Scope of delivery | PCIe, SATA |
Length | 14 cm |
Width | 15 cm |
Height | 8.60 cm |
Weight | 1490 g |
Length | 27 cm |
Width | 19.80 cm |
Height | 9.80 cm |
Weight | 2.08 kg |
Product Safety |
30-day right of return
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Reviews & Ratings
Statutory warranty score
How often does a product of this brand in the «Power Supply PC» category have a defect within the first 24 months?
Source: Galaxus- 1.Corsair0,9 %
- 2.be quiet!1 %
- 3.Xilence1,1 %
- 4.MSI1,2 %
- 4.Seasonic1,2 %
Statutory warranty case duration
How many working days on average does it take to process a warranty claim from when it arrives at the service centre until it’s back with the customer?
Source: Galaxus- 3.MSI1 day
- 3.Thermaltake1 day
- 11.Seasonic5 days
- 12.be quiet!6 days
- 13.ASUS8 days
Return rate
How often is a product of this brand in the «Power Supply PC» category returned?
Source: Galaxus- 1.MSI3,6 %
- 2.be quiet!3,7 %
- 3.Thermaltake3,8 %
- 4.Seasonic3,9 %
- 5.Gigabyte4,3 %