Intel Xeon X5680 's Advantages
Higher base frequency (3.333GHz vs 2GHz)
Lower TDP (130W vs 205W)
Intel Xeon Gold 5420 's Advantages
Released 12 years and 11 months late
Higher specification of memory (4400 vs 3)
Newer PCIe version (5 vs 2)
Larger L3 cache size (52.5MB vs 12MB)
More modern manufacturing process (10nm vs 32nm)