Watercool
Watercool MO-RA IV Passive Control
Best control solution for enthusiasts building high-performance external cooling loops.
The Watercool MO-RA IV Passive Control Module is the core component for managing your MO-RA IV radiator. It ensures optimal performance by delivering stable, conditioned PWM and tacho signals, even over extended cable lengths. This module provides substantial power, capable of supporting up to two D5 pumps and eighteen fans, along with three aRGB lighting modules. Seamlessly control and monitor your system through your mainboard's software. The package includes a compact MO-RA IV LINK module and a 1.5m main cable for a clean, integrated setup with hidden fan hub installation.
$138.50
Owner Satisfaction
4.8
/ 5
Category Rank
6
/ 3597
#6 in Computer System Cooling Parts
Price vs Category Average
-8%
Below average
Dimensions
639220
/ xxmm
Who it's for
- Overclockers seeking maximum thermal efficiency for high-performance builds
- Silent PC enthusiasts prioritizing near-silent operation under heavy loads
- Minimalist builders wanting cleaner aesthetics and more internal chassis space
Who should skip it
- Users with limited desk space or compact home office setups
- Budget-conscious builders avoiding high-end custom loop component costs
- Frequent travelers needing a portable or easily transportable PC
Performance breakdown
Power Delivery Capacity
Easily handles multiple high-draw pumps and massive fan arrays without strain.
Cable Management Efficiency
Hidden hub design keeps complex cooling loops looking remarkably clean.
Signal Integrity
Amplified transmission ensures reliable control even across long radiator cable runs.
System Integration
Seamlessly bridges external cooling hardware with standard mainboard software controls.
Connectivity Versatility
Integrated USB hub simplifies peripheral connections for complex custom loops.
Build Compactness
Small footprint allows for discreet mounting without sacrificing essential functionality.
Key Specs
Dimensions
63x92x20mm
Power (5V Rail)
30 watts
Power (12V Rail)
120 watts
Max Pump Support
2 D5 pumps
Max Fan Support
18 fans
Max aRGB Modules
3 modules
USB Hub
Integrated 2-port USB 2.0
Material
Plastic
Features
- Amplified PWM/tacho signal transmission
- Mainboard software control and monitoring
- Selectable fan side control
- Supports up to three aRGB modules
- Hidden fan hub for clean cabling
- Integrated 2-port USB 2.0 hub
- Stable power for pumps and fans
- Complete set with LINK module and cables
What customers say
The Watercool MO-RA IV Passive Control is celebrated by enthusiasts for its exceptional build quality and unmatched cooling capacity. Users consistently report dramatically lower component temperatures, allowing for near silent operation even under heavy loads. The robust, industrial construction assures long term durability, positioning this unit as a foundational piece for high end systems. While the initial investment is substantial, the performance gains and premium engineering fully justify the cost. The Passive Control integration further streamlines setup and adds appreciated modularity. The only noted trade off is the large physical size required for its massive heat dissipation capabilities. Overall, this solution delivers superior performance and quality for discerning cooling needs.
Know before you buy
This module acts as the central command hub for your MO-RA IV radiator setup. It conditions and amplifies PWM and tacho signals to ensure stable performance, even when using long cable runs to connect your external radiator to your PC.
The module is designed for high-capacity cooling loops, supporting up to 18 fans and two D5 pumps simultaneously. It provides 120 watts of power on the 12V rail to ensure these components operate reliably.
Yes, the module allows for seamless integration with your mainboard's existing fan control software. This lets you monitor and adjust your cooling performance directly from your desktop without needing proprietary software.
Absolutely. It includes a hidden fan hub and a 1.5m main cable, which helps consolidate your fan and pump wiring into a single, clean connection point, significantly reducing the clutter typically associated with external radiator setups.
The module supports up to three aRGB lighting modules. It is designed to integrate these into your existing lighting ecosystem, allowing you to synchronize the radiator's aesthetics with the rest of your system.
The integrated 2-port USB 2.0 hub is part of the system's connectivity suite. It simplifies your setup by providing extra ports directly at the radiator, which is useful for connecting additional internal USB devices without running extra cables back to the motherboard.
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Ask Hayley anything about this product before you decide.
Ready to buy?
$138