Intel Xeon X5647 's Advantages
Higher base frequency (2.933GHz vs 1.8GHz)
Lower TDP (130W vs 185W)
Intel Xeon Gold 6421N 's Advantages
Released 11 years and 11 months late
Higher specification of memory (4400 vs 3)
Newer PCIe version (5 vs 2)
Larger L3 cache size (60MB vs 12MB)
More modern manufacturing process (10nm vs 32nm)