Introduction
The be quiet! Pure Base 501 Airflow Black ATX Case is designed for users seeking a minimalistic aesthetic combined with effective noise reduction and optimized quiet functionality. This compact PC case offers enhanced cooling potential, flexible GPU installation options, and efficient layout with modern connectivity. This manual provides detailed instructions for assembly, operation, and maintenance to ensure optimal performance and longevity of your computer system.
Key Features
- Streamlined Design and Quiet Operation: Crafted for users who appreciate a minimalistic design with effective noise reduction, optimized for quiet functionality.
- Enhanced Cooling Potential: Includes a Pure Wings 3 140mm PWM fan with airflow-optimized blades to reduce turbulence and noise, supporting demanding builds with up to three front fans or a 360mm radiator and up to three top fans or a 240mm radiator.
- Flexible GPU Installation: Offers space for high-end graphics cards and large coolers, with PCIe slots that rotate 90° for vertical GPU mounting, supported by an optional riser cable to prevent GPU sag.
- Efficient Layout and Connectivity: Compact yet spacious, the Pure Base 501 provides smart cable management and front I/O ports with USB 3.2 Gen. 2 Type C and dual Type A for fast and convenient access.
- German Design, Engineering, Quality, and Performance.
Setup and Installation
1. Case Overview and Dimensions
Familiarize yourself with the dimensions and layout of the Pure Base 501 case before beginning installation.

Image: Front, rear, and side dimensions of the be quiet! Pure Base 501 Airflow Black ATX Case. The front panel features a mesh design for optimal airflow.
2. Disassembly of Panels and Components
To access the interior for component installation, remove the side panels and front panel. The case features tool-free side panels for easy access.

Image: An exploded view showing the removable components of the Pure Base 501 case, including side panels, top panel, and fans.
3. Motherboard and CPU Cooler Installation
Install your ATX motherboard and CPU cooler into the case. Ensure proper alignment with standoffs.

Image: Interior view of the Pure Base 501 case, highlighting the motherboard tray and pre-installed Pure Wings 3 140mm PWM fans.
4. Power Supply Unit (PSU) Installation
Install the PSU at the bottom of the case. The case supports bottom-mount PSUs. Ensure all necessary cables are routed for optimal cable management.
Video: Demonstrates the installation of a power supply unit (PSU) into a PC case, including cable routing. Note that the video shows a different case model, but the PSU installation principles are similar.
5. Graphics Card (GPU) Installation
Install your graphics card into the appropriate PCIe slot. The Pure Base 501 supports vertical GPU mounting with an optional riser cable.

Image: Interior view of the Pure Base 501 case with a graphics card and CPU cooler installed, showcasing the spacious layout.
6. Cable Management
Utilize the integrated cable management options to keep your build tidy and improve airflow. The case provides smart routing channels and tie-down points.
Video: Detailed guide on how to invert the Silent Base 802 case, which includes steps for cable management and component re-installation. While a different model, it illustrates general cable routing practices.

Image: Various accessories included with the Pure Base 501 case, such as screws, cable ties, and mounting brackets, essential for installation and cable management.
7. Final Assembly
Once all components are installed and cables are managed, reattach the side panels and ensure all connections are secure.

Image: A fully assembled PC build inside the Pure Base 501 case, demonstrating the final aesthetic and component placement.
Operating Instructions
The Pure Base 501 features convenient front I/O ports for easy access.

Image: Close-up of the front I/O panel of the Pure Base 501 case, showing the power button, USB ports (Type-C and Type-A), and audio jacks.
- Power On/Off: Press the large power button on the front I/O panel to turn the system on or off.
- USB Connectivity: Use the USB 3.2 Gen. 2 Type C and dual Type A ports for high-speed data transfer and peripheral connections.
- Audio: Connect your headphones and microphone to the dedicated audio jacks on the front panel.
Maintenance
Regular maintenance ensures optimal performance and extends the lifespan of your PC components.
- Dust Filter Cleaning: The Pure Base 501 features easily removable dust filters on the front, top, and bottom. Regularly clean these filters to maintain optimal airflow and prevent dust buildup inside the case.
- Interior Cleaning: Periodically open the side panels and use compressed air to remove dust from internal components, especially CPU coolers, GPU heatsinks, and case fans.
- Cable Management Check: Ensure cables remain neatly routed and do not obstruct airflow or fan operation.
Troubleshooting
If you encounter issues, consider the following common troubleshooting steps:
- No Power:
- Ensure the PSU is properly connected to the wall outlet and the motherboard.
- Check that the PSU switch is in the 'On' position.
- Verify all front panel connectors (power switch, reset switch) are correctly attached to the motherboard.
- Overheating Components:
- Clean all dust filters and internal components.
- Ensure case fans are operating correctly and are oriented for optimal airflow (intake at front/bottom, exhaust at rear/top).
- Verify CPU cooler and GPU fans are functioning.
- Excessive Noise:
- Check for loose cables or components that might be vibrating against the case or fans.
- Ensure all fans are securely mounted and free from obstructions.
- If using liquid cooling, check for pump noise or air bubbles.
Specifications
| Brand | be quiet! |
| Model Name | Pure Base 501 |
| Item Model Number | BG074 |
| Color | Airflow Black |
| Case Type | Mid Tower |
| Motherboard Compatibility | ATX |
| Item Weight | 14.96 pounds (6.8 Kilograms) |
| Product Dimensions (LxWxH) | 20.47 x 20.08 x 11.42 inches |
| Cooling Method | Air |
| Power Supply Mounting Type | Bottom Mount |
| USB 3.0 Ports | 3 (USB 3.2 Gen. 2 Type C and dual Type A) |
Warranty and Support
For warranty information and technical support, please refer to the official be quiet! website or contact their customer service directly. Keep your proof of purchase for warranty claims.
Manufacturer: be quiet!





