1. Introduction
This manual provides essential information for the installation, operation, and maintenance of your ARCTIC Liquid Freezer III Pro 360 A-RGB All-in-One (AIO) CPU Liquid Cooler. Please read these instructions carefully before proceeding with installation to ensure proper function and longevity of the product.

Image: The ARCTIC Liquid Freezer III Pro 360 A-RGB AIO CPU Cooler, showcasing its design and components.
2. Safety Information
Always observe the following safety precautions:
- Ensure your computer system is powered off and unplugged from the wall outlet before installation or maintenance.
- Handle components with care to avoid damage.
- Wear anti-static gloves or use an anti-static wrist strap to prevent electrostatic discharge (ESD) damage to sensitive electronic components.
- Keep the product away from moisture and extreme temperatures.
- Do not attempt to open or modify the sealed liquid cooling loop. Tampering may void the warranty and cause damage.
- Keep out of reach of children.
3. Package Contents
Verify that all components are present in the package:
- ARCTIC Liquid Freezer III Pro 360 A-RGB AIO Unit (Radiator, Pump, Fans, Tubing)
- Mounting Hardware for Intel LGA1851/LGA1700 sockets
- Mounting Hardware for AMD AM5/AM4 sockets
- Intel Contact Frame
- ARCTIC MX-6 Thermal Paste
- User Manual (this document)

Image: A tube of ARCTIC MX-6 thermal paste, included for optimal heat transfer.
4. Setup & Installation
Follow these steps for proper installation of your AIO CPU cooler. Refer to the official ARCTIC installation videos for visual guidance if needed.
4.1 Case Compatibility Check
Before installation, ensure your PC case has adequate space for the 360mm radiator and fans. The radiator has a thickness of 38mm.

Image: A close-up of the 38mm thick radiator, highlighting its robust design for efficient cooling.

Image: Diagram showing the dimensions of the 360mm radiator, crucial for case compatibility.
4.2 CPU Socket Preparation
The Liquid Freezer III Pro 360 A-RGB supports Intel LGA1851/LGA1700 and AMD AM5/AM4 sockets.
4.2.1 Intel LGA1851 / LGA1700 Contact Frame Installation
For Intel LGA1851 and LGA1700 sockets, the included contact frame is recommended to optimize contact pressure distribution, which can improve thermal performance and CPU longevity. Carefully remove the motherboard's stock Independent Loading Mechanism (ILM) backplate and install the ARCTIC contact frame according to the provided instructions.

Image: The Intel Offset Contact Frame, designed to improve CPU contact and heat dissipation.

Image: Diagram illustrating the offset mounting for Intel LGA 1700 and LGA 1851 sockets.
4.2.2 Native Offset Mounting for Intel and AMD
The cooler features native offset mounting, which shifts the cold plate center towards the CPU hotspot. This design ensures more efficient heat transfer from the CPU to the cooler.

Image: Diagram showing the offset mounting for both Intel (LGA 1700, 1851) and AMD Ryzen platforms.
4.3 Radiator and Pump Installation
- Mount the radiator to an available fan mounting location in your case (e.g., top, front).
- Apply the included ARCTIC MX-6 thermal paste to the center of your CPU's Integrated Heat Spreader (IHS).
- Secure the pump/cold plate assembly onto the CPU using the appropriate mounting hardware for your socket type. Ensure even pressure.
4.4 Cable Management
The PWM cables of the radiator fans are integrated into the sleeving of the hoses, simplifying cable management and reducing clutter. Only a single visible cable connects to the motherboard for fan and pump control.

Image: Close-up of the PWM cable integrated within the cooler's tubing for streamlined cable management.

Image: The VRM fan integrated into the Liquid Freezer III 360 pump housing, providing additional cooling to motherboard components.
5. Operating Instructions
5.1 Fan and Pump Control
The ARCTIC Liquid Freezer III Pro 360 A-RGB features PWM-controlled fans and an integrated VRM fan. These can be controlled via your motherboard's fan headers and BIOS settings or dedicated fan control software.

Image: The ARCTIC P12 Pro Fan, known for its performance and quiet operation.
5.2 Integrated VRM Fan
A dedicated PWM-controlled fan is integrated into the pump housing to actively cool the Voltage Regulator Modules (VRMs) on your motherboard. This helps maintain stable performance, especially under heavy CPU loads.

Image: The A-RGB VRM fan, providing cooling to motherboard components with customizable lighting.
5.3 A-RGB Lighting
The A-RGB fans and pump feature individually addressable Gen 2 LEDs. These can be synchronized with compatible motherboard software (e.g., ASRock Polychrome Sync, MSI Mystic Light Sync, Gigabyte RGB Fusion 2.0, Aura Sync) for customizable lighting effects.

Image: Logos of various A-RGB software compatibility, including ASRock, MSI, Gigabyte, and Aura Sync.
6. Maintenance
Regular maintenance ensures optimal performance and extends the lifespan of your cooler.
- Dust Cleaning: Periodically clean the radiator fins and fan blades with compressed air to remove dust buildup. Ensure fans are not spinning during cleaning.
- Visual Inspection: Regularly check the tubing and connections for any signs of leaks or damage. The premium tubing is designed for durability.
- Thermal Paste: Reapply thermal paste if you remove the cold plate from the CPU for any reason.

Image: Close-up of the premium tubing, designed for durability and leak prevention in liquid cooling systems.
7. Troubleshooting
If you encounter issues, refer to the following common solutions:
- High CPU Temperatures:
- Ensure the cold plate is securely mounted to the CPU with adequate thermal paste.
- Check that all fans are spinning and connected correctly.
- Verify that the pump is operating (you may feel a slight vibration or hear a faint hum).
- Clean any dust from the radiator fins.
- Fans Not Spinning / RGB Not Working:
- Check all power and A-RGB connections to the motherboard.
- Ensure fan headers are enabled in BIOS and A-RGB software is correctly configured.
- Unusual Noises:
- Verify that fan blades are not obstructed.
- Ensure the pump is not running dry (though unlikely with a sealed AIO).
- If a persistent grinding or bubbling noise occurs, contact support.
8. Specifications
| Feature | Detail |
|---|---|
| Model | LFIII Pro 360 A-RGB |
| Product Dimensions (L x W x H) | 4.7" x 15.7" x 2.9" (120mm x 398mm x 74mm) |
| Radiator Dimensions | 398mm x 120mm x 38mm |
| Material | Aluminum, Brass, Metal, Plastic, Rubber |
| Cooling Method | Liquid |
| Compatible Devices | Desktop PCs (Intel LGA1851/LGA1700, AMD AM5/AM4) |
| Fan Type | ARCTIC P12 Pro A-RGB Fan |
| Fan Speed | 600 - 3000 rpm |
| Air Flow Capacity | 77 cfm (131 m³/h) |
| Static Pressure | 6.9 mm H₂O |
| Power Connector Type | 4-Pin PWM |
| Voltage | 12 volts |
| Wattage | 3.96 watts |
| Item Weight | 2005 g |
| UPC | 840033402941 |

Image: Visual representation of ARCTIC P12 Pro A-RGB Fan specifications including fan speed, static pressure, and airflow.
9. Warranty & Support
9.1 Warranty Information
The ARCTIC Liquid Freezer III Pro 360 A-RGB AIO CPU Cooler comes with a 6-year manufacturer's warranty. Please retain your proof of purchase for warranty claims. The warranty covers defects in materials and workmanship under normal use.
9.2 Technical Support
For technical assistance, troubleshooting beyond this manual, or warranty inquiries, please visit the official ARCTIC website at www.arctic.ac. You may find additional resources, FAQs, and contact information for customer support there.