Intel Core i7 8700K 's Advantages
Released 1 years and 5 months late
Integrated graphics card
Higher specification of memory (DDR4-2666 vs DDR4-2133)
Higher base frequency (3.7GHz vs 3.4GHz)
Lower TDP (95W vs 140W)
Intel Core i7 6800K 's Advantages
Larger memory bandwidth (76.8GB/s vs 41.6GB/s)
Larger L3 cache size (15MB vs 12MB)