Intel Celeron 5205U 's Advantages
Released 6 months late
Lower TDP (15W vs 45W)
Intel Core i5 9400H 's Advantages
Higher specification of memory (2666 vs 2400)
Larger memory bandwidth (41.8GB/s vs 37.5GB/s)
Newer PCIe version (3.0 vs 2.0)
Higher base frequency (2.5GHz vs 1.9GHz)
Larger L3 cache size (8MB vs 2MB)