RUIX OV303
RUIX OV303 ATX Mid-Tower PC Case User Manual
Model: OV303 | Brand: RUIX
1. Introduction
This manual provides comprehensive instructions for the setup, operation, maintenance, and troubleshooting of your RUIX OV303 ATX Mid-Tower PC Case. Please read this manual thoroughly before installation and use to ensure optimal performance and longevity of your system components.
2. Package Contents
Verify that all components are present in the package:
- RUIX OV303 ATX Mid-Tower PC Case
- Pre-installed 4 x 120mm ARGB PWM Fans
- Accessory Box (screws, cable ties, standoffs, etc.)
- User Manual (this document)
If any items are missing or damaged, please contact RUIX customer support.
3. Product Overview
The RUIX OV303 is a high-airflow ATX mid-tower PC case designed for optimal cooling and component compatibility. It features panoramic tempered glass panels, pre-installed ARGB fans, and convenient front I/O ports.

Figure 3.1: Front view of the RUIX OV303 PC Case, showcasing the pre-installed ARGB fans and tempered glass panels.
3.1. Front I/O Panel

Figure 3.2: Detailed view of the Multi-Function Zone (front I/O panel) on the RUIX OV303 PC Case.
The front I/O panel provides easy access to essential ports and controls:
- Type-C Port: For modern high-speed connectivity.
- USB 3.0 Port: For high-speed data transfer.
- HD Audio Jacks: For headphone and microphone connections.
- Reset Button: To restart the system.
- Power Button: To power on/off the system.
3.2. Cooling System
The OV303 case is designed for superior thermal performance, featuring pre-installed ARGB PWM fans and extensive support for additional cooling solutions.

Figure 3.3: The RUIX OV303 PC Case comes with four 120mm ARGB fans pre-installed, ensuring efficient airflow and vibrant lighting.

Figure 3.4: Ample cooling options are available, supporting up to 10 x 120mm fans or a 360mm AIO liquid cooler with 7 x 120mm fans.

Figure 3.5: Professional heat dissipation design ensures optimal airflow, keeping internal components cool.
The case supports various fan and radiator configurations:
- Top: Up to 3 x 120mm fans or 1 x 360mm AIO radiator.
- Rear: 1 x 120mm fan (pre-installed).
- Side (Motherboard Tray): Up to 3 x 120mm fans (pre-installed).
- Bottom: Up to 3 x 120mm fans or 1 x 360mm AIO radiator.
3.3. Component Compatibility

Figure 3.6: Internal layout indicating compatibility for various PC components.

Figure 3.7: The spacious design accommodates ATX, Micro-ATX, and ITX motherboards.
- Motherboard Support: ATX, Micro-ATX, ITX
- GPU Length: Up to 420mm
- CPU Cooler Height: Up to 165mm
- Storage: 2 x 3.5-inch HDDs, 1 x 2.5-inch SSD
- PSU Type: ATX (Bottom Mount)
The case also includes a built-in GPU support bracket to prevent sag for heavy graphics cards.
4. Setup and Installation
Follow these steps for proper installation of your PC components into the RUIX OV303 case.
4.1. Preparing the Case
- Remove Side Panels: Carefully remove the tempered glass side panels. The OV303 features a snap-fit opening and closing method for easy access.

Figure 4.1: The triple glass front panel design allows for easy removal of panels for installation and maintenance.
- Identify Mounting Points: Familiarize yourself with the various mounting points for the motherboard, power supply, storage drives, and expansion cards.
4.2. Motherboard Installation
- Install the I/O shield into the rear opening of the case.
- Align your ATX, Micro-ATX, or ITX motherboard with the pre-installed standoffs. Ensure the screw holes on the motherboard align with the standoffs.
- Secure the motherboard using the provided screws.
4.3. Power Supply Unit (PSU) Installation
- Mount the PSU into its designated compartment at the bottom rear of the case.
- Secure the PSU with screws from the rear of the case.
4.4. Storage Drive Installation
- 3.5-inch HDDs: Locate the drive cages, typically near the PSU shroud. Slide the HDD into the tray and secure it with screws.
- 2.5-inch SSDs: Mount the SSDs onto the dedicated SSD trays or mounting points, usually behind the motherboard tray or on the PSU shroud. Secure with screws.
4.5. Graphics Card (GPU) Installation
- Remove the necessary PCIe slot covers from the rear of the case.
- Insert the GPU into the primary PCIe slot on your motherboard until it clicks into place.
- Secure the GPU to the case with screws.
- Utilize the built-in GPU support bracket to prevent sag, adjusting it to support the graphics card's weight.
4.6. Cable Management
The OV303 case offers ample space behind the motherboard tray for cable routing. Use the provided cable ties to bundle and secure cables, ensuring clean aesthetics and unobstructed airflow.
- Connect all necessary power cables from the PSU to the motherboard, GPU, and storage drives.
- Connect the front I/O panel cables (USB 3.0, Type-C, HD Audio, Power, Reset) to their respective headers on the motherboard.
- Connect the ARGB fan cables to the appropriate ARGB headers on your motherboard or a dedicated ARGB controller.
5. Operating Instructions
5.1. Powering On Your PC
Once all components are installed and cables are connected, replace the side panels. Connect your monitor, keyboard, and mouse. Press the Power button on the front I/O panel to turn on your PC.
5.2. ARGB Lighting Control
The pre-installed ARGB fans can be controlled via your motherboard's ARGB software (e.g., ASUS Aura Sync, MSI Mystic Light, Gigabyte RGB Fusion, ASRock Polychrome Sync) if connected to a compatible ARGB header. Refer to your motherboard manual for specific instructions on ARGB software usage.

Figure 5.1: The pre-installed 120mm ARGB PWM Prism Fans offer vibrant lighting effects, controllable via motherboard software.
6. Maintenance
Regular maintenance helps ensure optimal performance and extends the lifespan of your PC components.
6.1. Dust Filter Cleaning
The RUIX OV303 case is equipped with large magnetic dust filters on the top and bottom. These filters prevent dust from entering the case and should be cleaned regularly.
- Power off your PC and disconnect it from the power source.
- Gently remove the magnetic dust filters from the top and bottom of the case.
- Clean the filters using compressed air or by rinsing them with water. If using water, ensure they are completely dry before reattaching.
- Reattach the dust filters to their respective positions.
6.2. General Cleaning
Wipe down the exterior of the case, including the tempered glass panels, with a soft, damp cloth. Avoid using harsh chemicals or abrasive materials that could scratch the surfaces.
7. Troubleshooting
This section addresses common issues you might encounter with your PC case.
7.1. No Power
- Ensure the power cable is securely connected to both the PSU and the wall outlet.
- Check that the power switch on the PSU is in the 'ON' position.
- Verify that the front panel power button cable is correctly connected to the motherboard's F_PANEL header.
- Confirm that all internal power connections (24-pin ATX, CPU, GPU) are securely seated.
7.2. Fans Not Spinning / ARGB Not Lighting Up
- Check that the fan power cables are properly connected to the motherboard fan headers or a fan controller.
- Ensure the ARGB cables are correctly connected to the motherboard's 3-pin 5V ARGB header (not 4-pin 12V RGB).
- Verify that your motherboard's ARGB software is installed and configured correctly.
- If using a separate ARGB controller, ensure it is powered and functioning.
7.3. USB Ports Not Functioning
- Ensure the USB 3.0 and Type-C cables from the front I/O panel are securely connected to their corresponding headers on the motherboard.
- Check your motherboard's BIOS/UEFI settings to ensure USB ports are enabled.
- Install or update the necessary USB drivers for your motherboard.
8. Specifications
Detailed specifications for the RUIX OV303 ATX Mid-Tower PC Case:
| Feature | Specification |
|---|---|
| Model Name | OV303 |
| Case Type | Mid Tower |
| Motherboard Compatibility | ATX, Micro-ATX, ITX |
| Material | Metal, Tempered Glass |
| Color | Black |
| Dimensions (LxWxH) | 16.7 x 11 x 16.3 inches (424 x 279 x 414 mm) |
| Item Weight | 17.06 pounds (7.74 kg) |
| Pre-installed Fans | 4 x 120mm ARGB PWM Prism Fans |
| Max GPU Length | 420mm |
| Max CPU Cooler Height | 165mm |
| Storage Bays | 2 x 3.5" HDD, 1 x 2.5" SSD |
| Front I/O Ports | 1 x USB 3.0, 1 x Type-C, HD Audio (Mic/Headphone), Power, Reset |
| PSU Mounting Type | Bottom Mount |
| Cooling Method | Air, Water |
| Light Color | RGB (ARGB) |
9. Warranty and Support
RUIX products are manufactured to high quality standards. For warranty information and technical support, please refer to the official RUIX website or contact their customer service department.
For further assistance, please visit the RUIX Store on Amazon or contact the seller directly.
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