Intel Core i9 7920X 's Advantages
Larger memory bandwidth (85GB/s vs 50GB/s)
Higher base frequency (2.9GHz vs 2.6GHz)
Larger L3 cache size (17MB vs 12MB)
Intel Core i5 11400 's Advantages
Released 3 years and 7 months late
Integrated graphics card
Higher specification of memory (3200 vs 2666)
Newer PCIe version (4.0 vs 3.0)
Lower TDP (65W vs 140W)