Intel Xeon E3 1275 's Advantages
Higher base frequency (3.4GHz vs 2.4GHz)
Lower TDP (95W vs 185W)
Intel Xeon Gold 6312U 's Advantages
Released 10 years late
Higher specification of memory (3200 vs 3)
Newer PCIe version (4 vs 3)
Larger L3 cache size (36MB vs 8MB)
More modern manufacturing process (10nm vs 32nm)