Intel Xeon E5 4655 v3 's Advantages
Released 5 years and 3 months late
Higher specification of memory (2133 vs 1333)
Newer PCIe version (3 vs 2)
Higher base frequency (2.9GHz vs 2.666GHz)
Larger L3 cache size (30MB vs 18MB)
More modern manufacturing process (22nm vs 45nm)
Xeon X7542 's Advantages
Lower TDP (130W vs 135W)