ARCTIC Liquid Freezer III 420 A-RGB

Multi Compatible All-in-One CPU Water Cooler with A-RGB

Product Overview

The ARCTIC Liquid Freezer III 420 A-RGB is a high-performance All-in-One (AIO) CPU water cooler designed for efficient thermal management and customizable aesthetics. It features a large 420mm radiator, multiple PWM-controlled fans, and addressable RGB (A-RGB) lighting.

Warranty: Limited 6-Year Warranty ?

General Specifications

Compatibility	Intel® LGA1700 \| AMD® AM5, AM4
TIM (Thermal Interface Material)	MX-6 (0.8 g)
Operating Ambient Temperature	0-40°C
Weight	2325 g

Connection Details

The cooler utilizes several connectors for power and lighting:

A-RGB Connector: 3-pin. Pin 1: 5V DC Power, Pin 2: Signal (DI), Pin 3: Ground (-).
All-In-One Connector (CPU PWM): 4-pin. Pin 1: Ground (-), Pin 2: Power (+), Pin 3: Signal (Radiator Fan Tachometer Output), Pin 4: PWM Control.
Split Connector: Provides 3x 4-Pin PWM connectors for the radiator fans. Each fan connector has: Pin 1: Ground (-), Pin 2: Power (+), Pin 3: Signal (Tachometer Output), Pin 4: PWM Control.
Pump Cable: 4-pin. Pin 1: Ground (-), Pin 2: Power (+), Pin 3: Signal (Tachometer Output), Pin 4: PWM Control.
VRM Fan Cable: 4-pin. Pin 1: Blank, Pin 2: Blank, Pin 3: Signal (Tachometer Output), Pin 4: PWM Control.
Radiator Fan Cable: 4-pin. Pin 1: Blank, Pin 2: Blank, Pin 3: Signal (Tachometer Output), Pin 4: PWM Control.

Pump Specifications

Pump Speed	800-2800 rpm (PWM controlled)
Pump Current \| Voltage	0.35A \| 12 V DC
Cold Plate	Copper, Micro Skived Fins
Tube Length	450 mm
Tube Diameter	Outer: 12.4 mm \| Inner: 6.0mm

Radiator Specifications

Material	Aluminium
Dimensions	458 (L) x 138 (W) x 38 (H) mm

VRM Fan Specifications

VRM Fan Speed	400-2500 rpm (PWM controlled)
VRM Fan Current \| Voltage	0.05 A \| 12 V DC

Radiator Fan Specifications

General	3x P14 PWM A-RGB
Speed	200-1900 rpm
Airflow	69.90 cfm \| 117.06 m³/h
Static Pressure	2.0 mmH2O
Bearing	Fluid Dynamic Bearing
Current \| Voltage	0.17A \| 12V DC
Cable Length	40 mm
Connector	4-Pin PWM Connector

RGB Specifications

LEDs	12x A-RGB LEDs
Current \| Voltage	0.40 A \| 5 VDC
Cable Length	40 mm + 80mm Splitter Cable
Connector	3-Pin A-RGB Connector + 3-Pin Plug

Performance Graph

The performance graph illustrates the relationship between PWM control percentage and the rotational speed (rpm) for the Radiator Fans, VRM Fan, and Pump. The Radiator Fans operate between 200-1900 rpm, the VRM Fan between 400-2500 rpm, and the Pump between 800-2800 rpm, all controlled via PWM. The graph shows that speeds generally increase linearly with PWM input, with some components reaching their maximum speed before 100% PWM is applied.

Dimensional Drawings

Detailed dimensional drawings are provided for the components:

Fan: 140 mm x 140 mm x 27 mm.
Radiator: 457.5 mm (Length) x 138 mm (Width) x 38 mm (Height).
Pump Unit: Approximately 108.5 mm (Width) x 91 mm (Height) x 68.5 mm (Depth).
Other internal dimensions are also indicated, such as 19 mm and 38 mm for various parts of the radiator assembly.

Shipping Information

LF III 420 A-RGB (Black)

Box Dimension	447 (L) x 328 (W) x 158 (H) mm
Gross Weight	3000 g
SKU	ACFRE00145A
EAN	4895213704533
UPC	840033402309

LF III 420 A-RGB (White)

Box Dimension	447 (L) x 328 (W) x 158 (H) mm
Gross Weight	3000 g
SKU	ACFRE00153A
EAN	4895213704571
UPC	840033402347

Additional Information

All materials used in this product are compatible with RoHS requirements. For more information, visit arctic.de.

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