Intel Core i5 6600K 's Advantages
Higher base frequency (3.5GHz vs 3.4GHz)
Larger L3 cache size (6MB vs 2MB)
Intel Celeron G5900 's Advantages
Released 4 years and 9 months late
Higher specification of memory (2666 vs 2133)
Larger memory bandwidth (42.7GB/s vs 34.1GB/s)
Lower TDP (58W vs 91W)