Watercool
Watercool MO-RA IV 600 Black
Best external radiator for high-performance workstations and extreme overclocking builds.
Experience unparalleled cooling performance with the Watercool MO-RA IV 600 Black. This ultimate external radiator is engineered for the most demanding systems, offering a massive 7.1 m² cooling surface area across 120 copper pipes for exceptional heat dissipation. Its optimized corrugated fins enhance airflow, while the robust, soldered terminal ensures stability up to 5 bar. Designed for modularity and expansion, it features user-friendly mounting and an integrated fan splitter for a clean setup. Ideal for heavily overclocked workstations and dedicated servers seeking top-tier thermal management.
$720.25
Owner Satisfaction
4.8
/ 5
Category Rank
6
/ 3605
#6 in Computer System Cooling Parts
Price vs Category Average
+377%
Above average
External Dimensions (L x W x H)
70066275
/ x x mm
Who it's for
- Overclockers pushing high-end hardware to its absolute thermal limits
- Silent PC enthusiasts prioritizing a whisper-quiet computing environment
- Custom loop builders demanding premium materials and flexible configuration
Who should skip it
- Users with limited desk space or compact office environments
- Budget-conscious builders avoiding high-end cooling ecosystem investments
- Beginners intimidated by complex external loop planning and maintenance
Performance breakdown
Thermal Dissipation Capacity
Massive surface area handles extreme heat loads with ease.
Build Robustness
Industrial-grade construction ensures long-term reliability under high pressure.
Installation Flexibility
Modular mounting options adapt to any workstation or server configuration.
Cable Management
Integrated fan splitter keeps complex cooling setups remarkably tidy.
Flow Efficiency
Optimized fin geometry maximizes airflow for superior heat transfer.
System Compatibility
Standard G 1/4 threads ensure seamless integration with custom loops.
Key Specs
External Dimensions (L x W x H)
700 x 662 x 75mm
Weight
approx. 15.9 kg
Material
Tubes Copper, Fins Aluminium, External Powder-coated steel
Pressure Tested
5 bar
Connection
2x thread G 1/4 inch
Filling Capacity
approx. 3.04 liters
Radiator Size
600mm class
Cooling Type
Water Cooling
Features
- Massive 7.1 m² cooling surface area
- Pressure tested up to 5 bar
- Modular design for easy expansion
- Screw-less Quick Mount fan system
- Supports optional active/passive control
- Integrated fan splitter for clean cables
- Optimized corrugated fins for airflow
- Optional stands and wall mounting available
What customers say
The Watercool MO-RA IV 600 Black is celebrated in the high-performance PC community for its unmatched cooling capacity, offering massive thermal headroom for extreme builds. Customers consistently praise the exceptional build quality, noting its robust construction and premium finish, which reflects superior engineering. A key benefit users highlight is the significant reduction in fan noise; the large surface area allows for superior temperatures even when fans operate at very low speeds. This combination of extreme heat handling and near silent operation is a major differentiator. While the initial cost and external placement present logistical considerations, owners view these as necessary trade-offs for the unparalleled performance and reliability delivered by this specialized cooling solution.
Know before you buy
The MO-RA IV 600 features a massive 7.1 m² cooling surface area, making it capable of handling extreme thermal loads from heavily overclocked workstations or server-grade hardware that standard internal radiators cannot manage.
The unit is designed for versatility and can be used as a standalone external unit. Watercool offers optional dedicated stands and wall-mounting kits to help you integrate it into your workspace setup securely.
The Quick Mount system allows you to attach fans directly to the radiator without needing traditional screws. This simplifies the installation process and ensures a cleaner aesthetic while maintaining optimal airflow through the corrugated fins.
Yes, the integrated fan splitter is designed to consolidate your fan cables into a single connection point. This reduces cable clutter significantly, though you should ensure your motherboard header can handle the total current draw of all connected fans.
With a filling capacity of approximately 3.04 liters, you will need to account for a larger volume of coolant than a standard loop. Ensure your pump has sufficient head pressure to circulate fluid through the radiator's extensive copper pipe network.
While the MO-RA IV 600 is designed for high-performance active cooling, it supports optional control configurations that allow for passive operation. However, for maximum thermal efficiency under heavy loads, active airflow through the fins is highly recommended.
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$720