Intel Core i5 10400 's Advantages
Lower TDP (65W vs 125W)
Intel Core Ultra 7 265K 's Advantages
Released 4 years and 5 months late
Better graphics card performance
Higher specification of memory (6400 vs 2666)
Larger memory bandwidth (102.4GB/s vs 41.6GB/s)
Newer PCIe version (5.0 vs 3.0)
Higher base frequency (3.9GHz vs 2.9GHz)
Larger L3 cache size (30MB vs 12MB)
More modern manufacturing process (3nm vs 14nm)