Intel Xeon E3 1275 's Advantages
Higher base frequency (3.4GHz vs 2.5GHz)
Lower TDP (95W vs 175W)
Xeon 6523P B 's Advantages
Released 13 years and 10 months late
Higher specification of memory (5600 vs 3)
Newer PCIe version (5 vs 3)
Larger L3 cache size (96MB vs 8MB)
More modern manufacturing process (5nm vs 32nm)