The Intel Core Ultra 9 285K wins in 11 out of 14 comparable specs. Its biggest advantage is L2 Cache (2567% better).
Core i5-8400 wins in 3 specs (Max Turbo Power: 74% better).
Recommendation
Choose Core Ultra 9 285K if you want the best overall performance — especially l2 cache.
Choose Core i5-8400 if max turbo power matters more to you.
AI Versus Verdict
The Intel Core Ultra 9 285K is the objective winner of this comparison, securing victories in 11 out of 14 evaluated specifications. Its most impactful advantage is the L2 Cache, which is 2567% better than that of the Intel Core i5-8400. While the Intel Core i5-8400 maintains a 74% advantage in Max Turbo Power, the superior cache capacity of the newer processor provides a significant architectural lead across the majority of the measured categories.
Users prioritizing modern architecture and high-capacity cache should select the Intel Core Ultra 9 285K for their build. Conversely, the Intel Core i5-8400 remains a viable option for those specifically seeking the power profile defined by its Max Turbo Power advantage. Your choice should depend on whether you require the extensive cache improvements found in the newer model or the specific power characteristics offered by the older processor.
Generated by Gemini from the objective spec comparison above. AI advice is a summary, not a benchmark — always verify critical purchases.
