The Intel Core Ultra 9 285 is the objective winner of this comparison, securing victories in twelve out of sixteen measured specifications. Its most significant technical advantage over the Intel Core i5-12600K is its L2 cache, which is 321% larger. This substantial increase in cache capacity provides the primary performance edge for the newer architecture, outweighing the Intel Core i5-12600K, which maintains a 48% lead in base clock speed as its own most notable spec advantage.

Users prioritizing high-capacity cache for modern computing tasks should select the Intel Core Ultra 9 285 to leverage its superior memory architecture. Conversely, the Intel Core i5-12600K remains the appropriate choice for those who specifically require the higher base clock speed provided by that processor. By focusing on these distinct advantages, buyers can align their hardware selection with the specific technical strengths that best suit their individual operational requirements.