Liquid Cooling Systems

Closed Loop Liquid Cooling

• Self-contained system; cools a single component (CPU or GPU)
• Heat transferred from component → small radiator via liquid
• Advantages: simple installation, low maintenance
• Drawbacks: limited to one device, less efficient than open loop

Open Loop Liquid Cooling

• One cooling circuit serves multiple components (CPU, GPU, etc.)
• Higher heat-dissipation capacity, quieter operation
• More complex, expensive, and maintenance-intensive than closed loop

Key Hardware in an Open Loop

• Tubing / Water Loop: pathway for coolant
• Pump: circulates liquid through loop
• Reservoir: stores extra coolant; allows for thermal expansion/contraction
• Water Block: metal interface mounted on each component; channels coolant across hot surface
• Radiator: exposes heated coolant to airflow; removes heat before liquid returns to loop

Operating Cycle (Open Loop)

1. Heat moves from component → water block → coolant
2. Pump pushes hot coolant through tubing to radiator
3. Air passing over radiator fins cools liquid
4. Cooled liquid returns to components; cycle repeats continuously

Use Cases & Considerations

• Favored in high-performance PCs: 3D gaming rigs, CAD workstations, video-editing builds
• Rare in standard business environments due to cost, complexity, and risk of leaks
• Traditional fan-based active cooling remains dominant for everyday systems