Intel Pentium Gold 5405U 's Advantages
Integrated graphics card
Higher base frequency (2.3GHz vs 1.5GHz)
Intel Core Ultra 5 115U 's Advantages
Released 4 years and 11 months late
Higher specification of memory (LPDDR5X-7467 vs DDR4-2133)
Larger memory bandwidth (120GB/s vs 37.5GB/s)
Newer PCIe version (4 vs 2.0)
Larger L3 cache size (10MB vs 2MB)
More modern manufacturing process (7nm vs 14nm)