Intel Xeon W3530 's Advantages
Lower TDP (130W vs 150W)
Intel Xeon E5 2687W 's Advantages
Released 2 years late
Newer PCIe version (3 vs 2)
Higher base frequency (3.1GHz vs 2.8GHz)
Larger L3 cache size (20MB vs 8MB)
More modern manufacturing process (32nm vs 45nm)