Intel Xeon E5 2620 's Advantages
Released 2 years and 6 months late
Newer PCIe version (3 vs 2)
Larger L3 cache size (15MB vs 8MB)
More modern manufacturing process (32nm vs 45nm)
Xeon X3450 's Advantages
Higher specification of memory (1333 vs 3)
Higher base frequency (2.667GHz vs 2GHz)