The Intel Core i7-11700K wins in 9 out of 14 comparable specs, with 2 ties. Its biggest advantage is Threads (167% better).
Core i5-8400 wins in 3 specs (Max Turbo Power: 74% better).
Recommendation
Choose Core i7-11700K if you want the best overall performance — especially threads.
Choose Core i5-8400 if max turbo power matters more to you.
AI Versus Verdict
The Intel Core i7-11700K is the objective winner of this comparison, securing victories in nine out of fourteen measured specifications. Its most significant advantage over the Intel Core i5-8400 is its thread count, which is 167% better. This substantial increase in processing capacity provides a clear technical lead for the newer model, establishing it as the superior component across the majority of the evaluated performance metrics.
Users requiring high-level multitasking capabilities should choose the Intel Core i7-11700K to leverage its superior thread count. Conversely, the Intel Core i5-8400 remains a viable option for those prioritizing its 74% advantage in Max Turbo Power efficiency. Selecting between these two processors depends on whether your specific computing needs prioritize the raw thread capacity of the i7-11700K or the power-related benefits offered by the i5-8400.
Generated by Gemini from the objective spec comparison above. AI advice is a summary, not a benchmark — always verify critical purchases.
