A home user's PC has an over-clocked CPU with a relatively small heat sync, small fans on the 800W power supply, and a high-end video card. Which of the following is the recommended solution that…

Replacing the heatsink with a high-RPM fan alone may not provide enough thermal capacity for an overclocked CPU combined with a high-end GPU generating large amounts of heat.

Purchasing an energy-efficient power supply reduces power consumption slightly but does not address the core issue of excess CPU heat from overclocking.

Not overclocking the CPU would reduce heat but is not the recommended engineering solution when a properly designed cooling system can handle the thermal load.

Liquid cooling transfers heat away from the CPU (and optionally GPU) via water blocks and a radiator, providing significantly higher thermal dissipation capacity than air cooling alone. This is especially important for overclocked CPUs that generate substantially more heat than their rated TDP. Given the combination of an overclocked CPU, inadequate heatsink, and a high-end video card, liquid cooling addresses the root thermal problem comprehensively.