Intel Xeon E5 4650 's Advantages
Released 2 years late
Newer PCIe version (3 vs 2)
Larger L3 cache size (20MB vs 8MB)
More modern manufacturing process (32nm vs 45nm)
Xeon X3480 's Advantages
Higher specification of memory (1333 vs 3)
Higher base frequency (3.066GHz vs 2.7GHz)
Lower TDP (95W vs 130W)