Xeon E7 4820 's Advantages
Released 1 years and 1 months late
Higher specification of memory (1333 vs 3)
Larger L3 cache size (18MB vs 8MB)
More modern manufacturing process (32nm vs 45nm)
Lower TDP (105W vs 130W)
Intel Xeon W3530 's Advantages
Higher base frequency (2.8GHz vs 2GHz)