Be Quiet! SFX Power 3 300W Power Supply 80 Plus Bronze

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Identifiers
MPN Be Quiet BN320
Dimensions / Weight
Key Features
80plus rated
The efficiency certification level of a power supply unit, indicating the minimum percentage of input power that is converted to usable output at various load levels (e.g., 20%, 50%, 100%). Common ratings include "80 Plus", "80 Plus Bronze", "80 Plus Silver", "80 Plus Gold", "80 Plus Platinum" and "80 Plus Titanium". The value helps consumers compare energy efficiency and potential operating costs of different power supplies.
80 Plus Bronze
Ac input
The range of alternating current voltage that a power supply or charger can safely accept from its mains source, expressed in volts (V). It specifies the minimum and maximum input voltages compatible with the device, ensuring proper operation across different regions.
AC 100-240 V
Additional features
A comma‑separated list of extra functions or characteristics that a product offers, such as special modes, connectivity options, or unique technical capabilities. The values are typically short phrases and may include multiple items for a single product.
See Overview
Case colour
The colour or combination of colours that a product’s outer shell or enclosure is available in, expressed as common names such as "Black", "Silver" or comma‑separated lists like "Black, White". It indicates the visual appearance of the case for consumers.
Black
Compatability
Indicates the types of components, devices or form factors that a product can support or work with. The value may describe supported power supply units, graphics card clearance, memory modules, operating systems, or other hardware specifications.
SFX12V V3.42 & EPS 12V 2.92
Connectors 1 x ATX-Motherboard (20+4-pin)1 x P4 (CPU)1 x PCI-e 6+2-pin (GPU)2 x PATA3 x SATA1 x FDD (Floppy)
CPU Connectors
The total count of physical power connector sockets on a computer that supply voltage to the central processing unit (CPU). Common types include 4‑pin ATX, 8‑pin EPS, and 12V CPU connectors. This value indicates how many separate power connections are available for the CPU, helping users determine compatibility with power supplies and motherboard configurations.
1 x 4-pin EPS
Depth
The linear measurement of an object from front to back or top to bottom, expressed in a physical unit such as millimeters, centimeters, inches, etc. It indicates how deep the item is and can be used for fitting, compatibility, or spatial planning.
100 mm
Dimensions
The pixel dimensions of a display or image, expressed as width by height (e.g., 1920x1080). It indicates how many pixels are used to render the visual content and is commonly used for monitors, TVs, smartphones, cameras, and digital images.
23 x 39 x 40cm (W x H x D)
Efficiency
The efficiency rating expresses the percentage of input power that a product converts into useful output, indicating how well it uses energy compared to similar models. A higher value means less waste and lower operating costs.
"At 20% / 50% / 100% load AC 115V internal,the power efficiency should be at least 90% / 92% / 89%"
Fan Bearing
The classification of the mechanical bearing used in a fan or cooling component, such as ball, sleeve, fluid dynamic, hydraulic, magnetic levitation, or other specialized types. It indicates the internal design that determines load capacity, noise level, durability and suitability for specific applications.
Rifle Bearing
Floppy connector
The total count of physical connector ports present on a floppy drive or its support, indicating how many separate connections are available for power and/or data. This value helps users verify compatibility with power supplies, cables, or adapters.
1
Form factor
Specifies the physical configuration or design of a product, such as ATX, Micro‑ATX, Mini‑ITX, tower, case with cover, etc. It describes how the device is built and what mounting or expansion options it supports.
SFX Power Supply
Frequency Range
The span of frequencies, expressed in hertz (Hz), that a device can operate within or respond to. It may be given as a single value, a numeric range (e.g., "20 000‑50 000 Hz"), or an open‑ended interval such as "2.4 GHz+" indicating the lower bound only.
50 ~ 60 Hz
Height
The vertical dimension of a product measured from its lowest to highest point. It is expressed in a physical unit such as millimetres, centimetres or inches and applies to any item where height is relevant, including books, electronics, furniture and other objects.
64 mm
Modular
Indicates whether a product supports modular components or systems, such as modular power supplies, network switches, or other hardware that can be expanded or replaced with compatible modules.
Fully Wired
Modular cables
Indicates the type of cable configuration a power supply offers: fully modular, semi‑modular, or non‑modular. A value of "Modular" means all cables can be detached and reconnected; "Semi‑Modular" indicates that some cables are detachable while others remain permanently wired; "No" (or "Non‑Modular") signifies that all cables are fixed to the unit.
No
Molex connectors
The total count of Molex power connector ports present on a product, expressed as an integer without units. This value indicates how many Molex interfaces are available for connecting peripherals or components that require this type of connection.
2
Motherboard Power Connectors
The pin configuration of the power connector(s) used by a motherboard, expressed as a textual description such as "4 + 8-Pin" or "4-Pin x 2". It indicates how many pins are present in each connector and whether multiple connectors are required for proper operation.
4-Pin
Noise
The sound intensity produced by a product during operation, expressed in decibels with A‑weighting (dB(A)). This value indicates how loud the device is and helps users assess suitability for quiet environments or noise‑sensitive settings.
0dB Technology
Operating temperature
The range of temperatures in which a product can safely operate without risk of damage or performance degradation. Values are expressed in degrees Celsius (°C) and may represent a single temperature, a minimum–maximum interval, or an average operating point.
0 ~ 40 °C
PCI-E Pin Type
The arrangement of pins on a PCI‑Express connector, indicating how many power and data pins are present (e.g., "6+2-Pin", "8-Pin", "12+4-Pin"). This attribute helps determine compatibility with motherboards, GPUs, or other expansion cards that require specific pin counts for proper operation.
6+2-Pin
Pfc Active PFC
Power
The electrical power rating of a product, expressed in watts (W). It indicates how much energy the device consumes during operation or how much power it can deliver to connected equipment.
300 W
Protection
A comma‑separated list of protective features that a product offers, such as resistance to dust, water, shock, heat, or other environmental factors.
Over currentOver voltageUnder voltageShort circuitOver power
PSU Form Factor
The physical form factor of a power supply unit, indicating its size and mounting configuration (e.g., ATX, SFX, TFX). This attribute helps determine compatibility with computer cases and other hardware components.
SFX
Refresh rate
The number of times per second that a display updates its image, expressed in hertz (Hz). It indicates the smoothness and responsiveness of motion on the screen; higher rates generally provide a more fluid visual experience.
60Hz 2Ms Response Time
Safety
A list of safety and regulatory certifications that a product complies with, such as CE, UL, FCC, or other regional standards.
OCP, OVP, UVP, SCP, OPP
SATA Connectors
The total count of physical SATA interfaces available on a product, including all versions (SATA I, II, III). This value indicates how many storage devices can be connected simultaneously via SATA ports.
3
Weight
The mass of the product expressed in a standard unit such as grams or kilograms. It represents how heavy the item is and can be used for shipping calculations, handling instructions, or consumer information.
0.84 kg
Width
The horizontal measurement of a product, expressed in a linear unit such as millimetres or inches. It indicates how wide the item is from one side to the other and is used for sizing, fitting, and compatibility purposes.
125 mm
Be Quiet
Be Quiet is a German computer hardware company that produces power supplies, cases, and cooling solutions for personal computers. The company was founded in 2002 by Rolf Seitz and Jochen Goller.