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header-product Power Supply Unit be quiet! System Power 9 | 500W CM

Power Supply Unit be quiet! System Power 9 | 500W CM

Power Supply be quiet! System Power 9 Photo 1
Power Supply be quiet! System Power 9 Photo 2
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Power Supply be quiet! System Power 9 Photo 4
Power Supply be quiet! System Power 9 Photo 5
Power Supply be quiet! System Power 9 Photo 1
Power Supply be quiet! System Power 9 Photo 2
Power Supply be quiet! System Power 9 Photo 3
Power Supply be quiet! System Power 9 Photo 4
Power Supply be quiet! System Power 9 Photo 5
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Short description

The be quiet! System Power 9 | 500W CM is a reliable power supply unit designed for PCs. It offers a total power of 500W with an AC input voltage of 200-240V and a frequency of 50Hz. The 20+4 pin ATX motherboard power connector ensures compatibility, while the active cooling system with a 12 cm fan keeps it running efficiently. It features 80 PLUS Bronze certification for energy efficiency and includes PCIe and SATA cables for easy installation.
Warranty: 1 Year
SKU: 2085601
Manufacturer: bequiet!
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Product information

Description

The be quiet! System Power 9 | 500W CM is a reliable ATX power supply unit designed for price-conscious PC builders. Delivering 500 W of continuous power, it supports an AC input of 200–240 V at 50 Hz and includes a 20+4 pin ATX motherboard connector. The unit features a 120 mm active cooling fan, a black finish, and modular cable connectors for simplified installation.

Advantages

The power supply provides stable 500 W output with up to 89% efficiency and holds an 80 PLUS Bronze certification for improved energy use. A 120 mm fan ensures active cooling while maintaining low noise levels. Compact design and included PCIe and SATA cables make the System Power 9 | 500W CM suitable for straightforward system builds and upgrades.

Suitable for

  • Entry-level and mid-range desktop PCs
  • Office and home computer builds
  • System upgrades where reliable 500 W power is required

Key specifications

  • Total power: 500 W
  • Efficiency: 89%
  • 80 PLUS certification: 80 PLUS Bronze
  • Motherboard power connector: 20+4 pin ATX
  • Fan diameter: 120 mm
  • Input voltage / frequency: 200–240 V AC / 50 Hz
  • Weight: 1.56 kg
  • Product colour: Black

How to use

Install the PSU into an ATX-compatible case, secure it with the provided mounting points, and connect the 20+4 pin ATX cable to the motherboard. Attach PCIe and SATA connectors to graphics cards and storage devices as required. Ensure proper cable routing and airflow around the 120 mm fan, and connect the unit to an appropriate 200–240 V AC mains supply before powering on the system.

Usage recommendations

For stable operation, use this unit in systems with total component power draw below 500 W and ensure the case provides adequate ventilation. Periodically check cables and dust buildup around the fan to maintain efficiency and quiet operation.

Specifications

80 PLUS certification:
80 PLUS Bronze
Power supply unit (PSU) form factor:
ATX
Purpose: What the product is used for.
PC
Motherboard power connector: The way in which the motherboard is connected to the power supply.
20+4 pin ATX
AC input voltage: The voltage of the AC electricity that is inputted into the product.
200 - 240
Total power: The total power that is needed by the device, or the total power produced by the device.
500 W
All features

Other features

Noise level (full-load mode, 100%):
24.4 dB
Noise level (quiet mode, 50%):
11.5 dB
Noise level (silent mode, <30%):
9.7 dB
Screws included:
Yes

Logistics data

Products per master (outer) case:
6 pc(s)
Master (outer) case gross weight:
14020 g
Harmonized System (HS) code:
84733020
Master (outer) case height:
556 mm
Master (outer) case length:
215 mm
Master (outer) case width:
311 mm

Technical details

Sustainability certificates:
ENERGY STAR

Packaging data

Package type: The type of product package e.g. box.
Box
Package weight: Weight of the packaged product.
2220 g
Package height: The distance from the top to the bottom of the packaging.
195 mm
Package depth: The distance from the front to the back of the packaging.
268 mm
Package width: The distance from one side of the packaging to the other.
97 mm
Manual:
Yes

Weight & dimensions

Weight: Weight of the product without packaging (net weight). If possible, the net weight is given including standard accessories and supplies. Please note that sometimes the manufacturer leaves out the weight of accessories and/or supplies.
1.56 kg
Height: The measurement of the product from head to foot or from base to top.
86 mm
Depth: The distance from the front to the back of something.
140 mm
Width: The measurement or extent of something from side to side.
150 mm

Certificates

Certification:
CE, CB, TÜV, RCM, CU
Compliance certificates: Indicates which regulatory, safety, and environmental standards the product complies with, as verified by recognized authorities or certification bodies.
RoHS

Packaging content

Cables included:
PCIe, SATA

Design

Number of fans: The quantity of fans (apparatus with rotating blades that creates a current of air for cooling or ventilation).
1 fan(s)
Fan diameter: The size of the fan, measured by the distance from one side of the fan to the other, via a straight line going through the middle of the fan.
120 mm
Cooling type: The method used to cool the device or to cool the air around the device.
Active
Product colour: The colour e.g. red, blue, green, black, white.
Black

Performance

Compatible products: Other products that can be used with this product.
Intel C6/C7
Bearing technology:
Sleeve
ATX version: ATX (Advanced Technology eXtended) is a motherboard form factor specification developed by Intel in 1995. The specification defines the key mechanical dimensions, mounting point, I/O panel, power and connector interfaces between a computer case, a motherboard and a power supply. There are many versions of ATX including ATX12V 1.x and ATX12V v2.3.
2.51
80 PLUS certification:
80 PLUS Bronze
Power supply unit (PSU) form factor:
ATX
Purpose: What the product is used for.
PC

Ports & interfaces

Cabling type:
Semi-Modular
Floppy drive power connector:
1
CPU power cable length:
600 mm
CPU power connector (4+4 pin):
Yes
PCI Express power cable length:
500 mm
PCI Express power connectors (6+2 pin):
2
SATA power cable length:
670, 550
Number of SATA power connectors:
6
Number of PATA power connectors:
2
Motherboard power cable length:
550 mm
Motherboard power connector: The way in which the motherboard is connected to the power supply.
20+4 pin ATX

Power

Power protection features: Features that protect the device against power problems e.g. overload.
Short circuit, Under voltage, Overheating, Over voltage, Over power, Over current
Efficiency:
89 %
Hold time:
17 ms
Max output current (+5Vsb):
3 A
Max output current (-12V):
0.3 A
Max output current (+5V):
15 A
Max output current (+12V2):
20 A
Max output current (+12V1):
24 A
Max output current (+3.3V):
24 A
Combined power (+5Vsb):
15 W
Combined power (-12V):
3.6 W
Combined power (+5V):
110 W
Combined power (+12V):
456 W
Combined power (+3.3V):
110 W
Power Factor Correction (PFC) type:
Active
Power factor:
0.95
Input current:
4
AC input frequency:
50
AC input voltage: The voltage of the AC electricity that is inputted into the product.
200 - 240
Total power: The total power that is needed by the device, or the total power produced by the device.
500 W

Description

Machine translation.

Reasons to buy

Very Quiet Operation

The be quiet! System Power 9 | 500W CM features a temperature-controlled 120 mm fan that delivers whisper-quiet cooling. Enjoy noticeably lower noise levels during everyday use and under load, bringing the quiet reputation of be quiet! into an affordable, entry-level power supply.

80 PLUS Bronze Efficiency

This PSU carries an 80 PLUS Bronze certification, demonstrating efficient power delivery and reduced energy waste. With efficiency of up to 89%, it helps lower electricity consumption and heat output compared with non-certified units.

High Performance for Your System

With 500 W of stable power, two independent 12 V rails and two PCIe connectors, the System Power 9 | 500W CM reliably supplies CPU and GPU demands and supports multi-GPU configurations where required.

Innovative DC-to-DC Conversion

DC-to-DC conversion ensures tight voltage regulation even under heavy cross-loading. This improves stability and compatibility with modern processors and graphics cards for dependable performance under varied workloads.

Semi-Modular Cable Management

Equipped with high-quality black sleeved cables and a semi-modular design, this PSU lets you connect only the cables you need for a cleaner build and improved airflow while maintaining a premium look.

Comprehensive Protection

Built-in safety features — including OCP, OVP, OPP, OTP, UVP and SCP — provide extensive protection for components and ensure secure, reliable operation of your system.

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Customer reviews

Customer questions

FAQ

What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

What is the warranty period?

All bequiet! products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized bequiet! service centers and through AiO.lv

Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. We will assist with consultation, warranty claim processing, and coordination with certified service centers.

How can I tell if this product suits my needs?

When making a choice, we recommend paying attention to the key features: 80 plus certification, power supply unit (psu) form factor, purpose, motherboard power connector, ac input voltage, total power, compatibility with your devices or usage conditions, material quality, functionality, and warranty terms. These characteristics will help you determine how well the model meets your needs.

Where can I download the instructions for Power Supply be quiet! System Power 9?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.
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