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Difficulty: EasyCPU Architecture Cooling and Sockets

A system technician is servicing various desktop computers and reviewing thermal management components. Match each CPU cooling component on the left with its primary operational function on the right.

  • Thermal Paste (TIM)Fills microscopic air gaps between the CPU heat spreader and cooling block to maximize heat transfer.
  • Heat PipeTransfers heat from the CPU base plate using internal liquid-to-vapor phase change inside sealed tubes.
  • Radiator AssemblyDisperses thermal energy from liquid coolant into surrounding air via high-surface-area metal fins and fans.
  • Passive HeatsinkCools the CPU entirely through thermal radiation and natural air convection without any attached powered fan.

Answer

Thermal Paste matches with filling microscopic air gaps; Heat Pipe matches with liquid-to-vapor phase change heat transfer; Radiator Assembly matches with dispersing heat from liquid coolant into air using fans; Passive Heatsink matches with cooling through natural convection without powered fans.
Each cooling component performs a distinct function: Thermal Paste eliminates air gaps between CPU and cooler base; Heat Pipes transfer heat via fluid phase change; Radiators dissipate heat from liquid coolant using fan airflow; and Passive Heatsinks dissipate heat via convection without active fans.

Step-by-Step Solution

1
Identify the primary function of Thermal Paste (TIM).
TIM is designed to bridge micro-gaps between metallic surfaces because air is a poor thermal conductor.
Direct metal-to-metal contact leaves microscopic air pockets that trap heat.
2
Identify the thermal transfer mechanism of Heat Pipes.
Heat pipes rely on internal phase-change fluid (evaporation and condensation) inside hollow copper tubes.
Phase change allows rapid heat transport away from the CPU cold plate to the heatsink fins.
3
Identify the role of a Radiator Assembly in liquid cooling.
The radiator receives warm coolant fluid pumped from the water block and cools it using radiator fins and mounted fans.
It acts as the primary heat exchanger between the liquid coolant loop and the computer case exhaust air.
4
Identify the defining feature of a Passive Heatsink.
Passive heatsinks do not have direct fan attachments and rely purely on ambient airflow and high surface area.
They are used in low-TDP or noise-sensitive environments where active fans are not required.

Key Concept

CPU Cooling Mechanisms and Thermal Management Components
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Topics

CPU Architecture Cooling and Sockets

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