1. Introduction
Thank you for choosing the Erilles Prism 4RS ARGB CPU Case Fan. This fan is designed to provide efficient cooling for your PC while offering stunning customizable ARGB lighting effects. Featuring an innovative infinity mirror design and advanced control options, it enhances both the performance and aesthetics of your computer system. Please read this manual carefully before installation and use to ensure proper operation and longevity of your product.

2. Key Features
- Innovative Illumination Technology: Unique dual-sided infinity lens lighting effects with an axial CD pattern for enhanced depth perception.
- Advanced ARGB Lighting Sync: Supports 5V ARGB motherboard interfaces (ASUS, MSI, Gigabyte, ASRock) for software-controlled, customizable lighting with 16.8 million colors.
- Quiet and Efficient Cooling: 4PIN PWM interface for intelligent temperature control, automatically adjusting fan speed. Features a hydraulic bearing for longer lifespan and quieter operation.
- Durable Materials: High-strength, high-temperature resistant PBT material blades and silicone pads to reduce vibration and noise.
- Reversible Airflow Direction: Offers both standard and reverse airflow for optimal case placement and visual effects.
3. Setup and Installation
3.1 Unpacking
Carefully remove the fan from its packaging. Ensure all components are present and undamaged. Keep the packaging for future reference or transport.
3.2 Fan Orientation and Airflow
The Prism 4RS fan supports both forward and reverse rotation to optimize airflow within your PC case:
- Forward Rotation: Wind blows toward the back of the fan. Generally suitable for the top and back of the chassis (exhaust).
- Reverse Rotation: Wind blows toward the front of the fan. Generally suitable for the front and bottom of the chassis (intake).

3.3 Connection Instructions
The fan requires two connections: one for power/speed control (4-Pin PWM) and one for ARGB lighting (5V 3-Pin ARGB).
Option 1: Direct Motherboard Connection (Recommended for ARGB Sync)
- Connect Fans in Series: Connect up to 4 fans in series with each other using the provided cables.
- Connect to Motherboard:
- Connect the 5V 3-pin ARGB lighting interface to a compatible 5V 3-pin ARGB socket on your motherboard (e.g., CPUFAN, SYSFAN4 pin). This allows for software control and synchronization of lighting effects.
- Connect the 4-Pin PWM fan interface to a 4-Pin PWM fan header on your motherboard. This enables intelligent temperature control.


Note: If your motherboard does not support a 5V 3-pin ARGB interface, a separate fan cannot be used for ARGB lighting without an external ARGB controller.
Option 2: Connection via a Fan Hub/Controller
If you are using a fan hub or a 2-in-1 control box (common in the market):
- Connect the fan's 5V 3-pin ARGB lighting cable to the corresponding socket on the hub.
- Connect the fan's 4-Pin PWM cable to the operating interface on the hub.
- Connect the SATA power head from the hub to your power supply unit (PSU) to provide power.
- Connect the hub to your motherboard's 5V 3-pin ARGB header (if available) for software control, or use the hub's built-in controls.

4. Operating Instructions
4.1 Power On/Off
The fan will power on and off automatically with your computer system, provided it is correctly connected to the motherboard or a powered fan hub.
4.2 ARGB Lighting Control
If connected to a compatible 5V 3-pin ARGB motherboard header, you can control the fan's lighting effects using your motherboard's ARGB software (e.g., ASUS Aura Sync, MSI Mystic Light Sync, Gigabyte RGB Fusion, ASRock Polychrome Sync). This allows for a wide range of customizable colors and dynamic lighting patterns.
If using an external ARGB controller, refer to the controller's manual for specific lighting adjustment instructions.
4.3 PWM Temperature Control
The 4-Pin PWM interface allows your motherboard to intelligently control the fan speed based on your CPU temperature. This ensures optimal cooling performance when needed and quieter operation during lighter loads. You can typically configure fan curves within your motherboard's BIOS/UEFI settings or through dedicated software.
5. Maintenance
To ensure optimal performance and longevity of your fan, regular maintenance is recommended:
- Dust Cleaning: Periodically clean the fan blades and frame to remove accumulated dust. Use compressed air or a soft brush. Ensure the fan is powered off before cleaning.
- Bearing: The fan uses a hydraulic bearing with a unique recirculating oil supply loop, designed for a long lifespan and quiet operation. No user maintenance or lubrication is required for the bearing.
6. Troubleshooting
If you encounter issues with your Prism 4RS fan, please refer to the following common solutions:
- Fan Not Spinning:
- Check if the 4-Pin PWM power cable is securely connected to the motherboard or fan hub.
- Ensure your power supply unit (PSU) is providing adequate power.
- Verify that the fan header on the motherboard is enabled in BIOS/UEFI settings.
- ARGB Lights Not Working or Incorrect:
- Ensure the 5V 3-pin ARGB cable is correctly and securely connected to a compatible motherboard header or ARGB controller.
- Check your motherboard's ARGB software or external controller settings to ensure lighting is enabled and configured correctly.
- Confirm that your motherboard has a 5V 3-pin ARGB header, not a 12V 4-pin RGB header (these are incompatible).
- Excessive Noise/Vibration:
- Ensure the fan is securely mounted to the chassis.
- Check for any cables or obstructions that might be hitting the fan blades.
- Verify that the silicone pads at the corners of the fan frame are properly installed to reduce vibration.
7. Specifications
| Feature | Specification |
|---|---|
| Model Number | Prism 4RS |
| Brand Name | Erilles |
| Fan Size | 120mm (120.00x120.00x25.00mm) |
| Power | 4.5 W |
| Bearing Type | Fluid Bearing (Hydraulic Bearing) |
| Noise Level | 16~29dBA |
| Power Interface | 4-Pin PWM |
| ARGB Interface | 5V 3-Pin ARGB |
| Rated Voltage (Fan) | DC 12V |
| Rated Voltage (Lamp Bead) | DC 5V |
| Rated Current | 0.25A |
| Number of Fan Blades | 9 |
| Speed | 800~1800 RPM |
| Wind Pressure | 2.07mm H2O |
| Air Volume | 58CFM |
| Life Expectancy | 1,000,000 Hours |
| Wire Length | 500mm |
| Used For | CPU radiator, Radiator water cooling, Host chassis (120mm fan) |
8. User Tips
- For optimal cooling and aesthetics, plan your fan placement carefully, utilizing both forward and reverse airflow fans to create a balanced intake and exhaust system.
- Always ensure your motherboard supports 5V 3-pin ARGB for lighting synchronization. Using a 12V 4-pin RGB header with a 5V ARGB device can cause damage.
- Take advantage of the PWM control by setting custom fan curves in your motherboard's BIOS to balance noise and performance according to your needs.
- When connecting multiple fans, connect them in series for ARGB lighting to ensure consistent effects.
9. Warranty and Support
For warranty information or technical support, please contact the seller or manufacturer directly. Keep your proof of purchase for any warranty claims.





