Which component is essential for ensuring safe overclocking of a CPU?

A quality CPU cooler is crucial for safe overclocking because overclocking increases the CPU's performance by allowing it to run at a higher clock speed than its base specification. This enhanced performance generates additional heat, which can pose risks to the CPU's stability and longevity if not managed appropriately. An effective cooler ensures that the CPU remains within safe temperature thresholds, preventing overheating that could lead to system crashes or hardware damage.

Proper cooling can come from various types of coolers, including air coolers and liquid cooling systems, depending on the amount of heat generated and the desired level of performance. Using a high-capacity power supply, advanced firmware, or a fast storage device may contribute to an overall better system performance, but they do not directly address the thermal management necessary for successful and safe overclocking.