The Intel Core i5-14400 is the objective winner of this comparison, securing victories in eleven out of fourteen measured specifications. Its most significant technical advantage over the Intel Core i7-7700K is its L2 cache, which is 850% larger. This substantial increase in cache capacity provides the primary performance edge for the newer processor, while the older model maintains a 68% higher base clock speed as its only notable lead in the evaluated categories.

Users prioritizing modern architecture and superior cache capacity should select the Intel Core i5-14400 for their system. Conversely, the Intel Core i7-7700K remains the appropriate choice for those who specifically require a higher base clock speed for their computing needs. By focusing on these distinct advantages, buyers can align their hardware selection with the specific technical strengths offered by each of these two processors.