Intel Core i7 8700K 's Advantages
Integrated graphics card
Higher base frequency (3.7GHz vs 3.0GHz)
Lower TDP (95W vs 165W)
Intel Core i9 9980XE 's Advantages
Released 1 years late
Larger memory bandwidth (79.47GB/s vs 41.6GB/s)
Larger L3 cache size (25MB vs 12MB)