Cooler Master MB600-WGNN-S00
Cooler Master MasterBox 600 White ATX Mid-Tower Case User Manual
Model: MB600-WGNN-S00
Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your Cooler Master MasterBox 600 White ATX Mid-Tower Case. Please read this manual thoroughly before beginning your PC build to ensure proper assembly and optimal performance.
The MasterBox 600 is designed to offer superior compatibility and thermal performance for modern PC components, including back-connected motherboards, large GPUs, and extensive liquid cooling solutions.

Figure 1: Front view of the Cooler Master MasterBox 600 White ATX Mid-Tower Case, showcasing the fine mesh front panel and pre-installed SickleFlow PWM fans with ARGB lighting.
Package Contents
Verify that all components are present before proceeding with installation:
- MasterBox 600 White ATX Mid-Tower Case
- Accessory Box (screws, zip ties, standoffs, etc.)
- Pre-installed 140mm SickleFlow PWM Fans (quantity as specified on packaging)
- User Manual (this document)
If any items are missing or damaged, please contact Cooler Master support.
Setup and Installation
Follow these steps for proper setup and installation of your PC components within the MasterBox 600 case.
1. Preparing the Case
- Place the case on a stable, flat surface.
- Carefully remove the tempered glass side panel by unscrewing the thumb screws and gently pulling it away. Set it aside on a soft, non-abrasive surface to prevent scratches.
- Remove the rear metal side panel to access the cable management area.
2. Motherboard Installation
The MasterBox 600 supports ATX motherboards, including back-connected designs.

Figure 2: Rear view of the motherboard tray, highlighting cutouts for back-connected motherboards from brands like Asus, MSI, and Gigabyte, which allows for cleaner cable management.
- Ensure the correct standoffs are installed for your motherboard form factor.
- Carefully align your motherboard with the standoffs and I/O shield opening.
- Secure the motherboard with the provided screws.
3. Power Supply Unit (PSU) Installation
The PSU mounts at the bottom of the case.
- Slide the PSU into its designated bay from the rear of the case.
- Secure the PSU with screws from the rear of the case.
4. Storage Drive Installation
The case supports 2 x 3.5" HDDs and 6 x 2.5" SSDs.

Figure 3: The removable storage cage, designed to support both 3.5-inch HDDs and 2.5-inch SSDs, facilitating easy installation and upgrades.
- For 3.5" HDDs, use the removable drive cage located at the bottom front. Slide the drive into the tray and secure it.
- For 2.5" SSDs, mount them on the dedicated trays behind the motherboard tray or on top of the PSU shroud.
5. Graphics Card (GPU) Installation
The MasterBox 600 accommodates GPUs up to 410mm in length.

Figure 4: A visual guide illustrating the maximum supported dimensions for key components: 410mm for the GPU, 170mm for the CPU cooler height, and 170mm for the PSU length.
- Remove the necessary PCIe slot covers from the rear of the case. Note that these are break-away covers and are not reusable.
- Insert your GPU into the PCIe slot on the motherboard.
- Secure the GPU with screws.
6. Cooling System Installation (Fans & AIO)
The case supports extensive cooling configurations, including up to a 420mm AIO radiator.

Figure 5: The MasterBox 600 demonstrating support for a 420mm liquid cooler, ensuring optimal thermal performance for high-end systems.

Figure 6: Visual representation of the exceptional airflow provided by the 140mm SickleFlow PWM fans, designed for efficient cooling.

Figure 7: A detailed view of the FineMesh front panel, illustrating how its large mesh intakes ensure unrestricted airflow into the case.
- Install additional fans or liquid cooling radiators as desired. The front panel supports up to 3 x 140mm fans or a 420mm radiator. The top panel supports up to 3 x 120mm fans or a 360mm radiator. The rear supports 1 x 120mm or 140mm fan.
- Ensure proper airflow direction for optimal cooling.
7. Cable Management
Utilize the ample space behind the motherboard tray and the included cable ties for clean cable routing. This is especially beneficial for back-connected motherboards.

Figure 8: The spacious area behind the motherboard tray, designed for efficient cable management, especially useful for back-connected motherboards.
8. Front I/O Connections
Connect the front panel cables (USB 3.0, USB 3.2 Gen Type-C, audio, power, reset, LED) to their respective headers on your motherboard.

Figure 9: A close-up view of the integrated I/O panel, featuring a USB 3.2 Gen Type-C port for modern connectivity.
Operating Instructions
Once all components are installed and cables are connected, replace the side panels and power on your system.
- Ensure all external peripherals (monitor, keyboard, mouse) are connected.
- Connect the power cable to the PSU and a wall outlet.
- Flip the power switch on the PSU to the 'ON' position.
- Press the power button on the front I/O panel of the case.
- Observe system boot-up and fan operation.

Figure 10: The spacious interior of the MasterBox 600, accommodating ATX or Micro-ATX motherboards, designed for easy setup and component installation.
Maintenance
Regular maintenance helps ensure optimal performance and longevity of your MasterBox 600 case and its components.
- Dust Filters: The MasterBox 600 features removable dust filters on the front and top panels, and for the PSU intake. Regularly clean these filters by gently removing them and brushing off accumulated dust or rinsing with water (ensure they are completely dry before reinstallation).
- Interior Cleaning: Periodically open the case and use compressed air to remove dust from fans, heatsinks, and other components. Ensure the system is powered off and unplugged before cleaning.
- Cable Management: Periodically check cable routing to ensure no cables are obstructing airflow or fan blades.
Troubleshooting
This section addresses common issues you might encounter.
| Problem | Possible Cause | Solution |
|---|---|---|
| System does not power on. | PSU switch off, power cables loose, front panel power button not connected. | Ensure PSU switch is ON. Check all power connections (24-pin, CPU, GPU). Verify front panel power button cable is correctly connected to motherboard. |
| Fans are not spinning or RGB is not lighting up. | Fan/RGB cables disconnected, controller issues. | Check fan and RGB connections to motherboard headers or fan controller. Ensure controller has power. |
| Poor airflow or high temperatures. | Dust filters clogged, incorrect fan orientation, insufficient cooling. | Clean dust filters. Verify fans are oriented for optimal intake/exhaust. Consider adding more fans or upgrading cooling solution. |
| USB ports on front panel not working. | Front panel USB cables disconnected from motherboard. | Check USB 3.0 and USB 3.2 Gen Type-C header connections on the motherboard. |
If you continue to experience issues, please refer to the support section or contact Cooler Master technical support.
Specifications
| Feature | Detail |
|---|---|
| Model Name | MasterBox 600 White |
| Model Number | MB600-WGNN-S00 |
| Case Type | Mid Tower |
| Motherboard Compatibility | ATX (including Back-Connected), Micro-ATX, Mini-ITX |
| Materials | Tempered Glass, Stainless Steel, Plastic |
| Color | White |
| Dimensions (L x W x H) | 18.66 x 9.05 x 18.93 inches (474 x 230 x 481 mm) |
| Weight | 17.41 pounds (7.9 kg) |
| Expansion Slots | 7 |
| Drive Bays | 2 x 3.5" HDD, 6 x 2.5" SSD |
| Front I/O Ports | 1 x USB 3.2 Gen Type-C, 1 x USB 3.0, Audio In/Out |
| Pre-installed Fans | Front: 3 x 140mm SickleFlow PWM ARGB, Rear: 1 x 140mm SickleFlow PWM ARGB |
| Fan Support (Max) | Front: 3 x 120mm / 3 x 140mm, Top: 3 x 120mm / 2 x 140mm, Rear: 1 x 120mm / 1 x 140mm |
| Radiator Support (Max) | Front: 360mm / 420mm, Top: 360mm, Rear: 120mm / 140mm |
| Max GPU Length | 410mm |
| Max CPU Cooler Height | 170mm |
| Max PSU Length | 170mm |
Warranty Information
Cooler Master products come with a limited warranty. For detailed warranty terms and conditions, please visit the official Cooler Master website or refer to the warranty card included with your product. Keep your proof of purchase for warranty claims.
Support
For technical assistance, product inquiries, or to report issues, please contact Cooler Master support through the following channels:
- Cooler Master Official Website: www.coolermaster.com
- Support Portal: Visit the support section on the Cooler Master website for FAQs, drivers, and contact forms.
When contacting support, please have your product model number (MB600-WGNN-S00) and purchase information ready.
Ask a question about this manual
Ask about setup, troubleshooting, compatibility, parts, safety, or missing instructions. Manuals+ will review the question and use this page’s manual context to help answer it.







