Intel Xeon E5 2658A v3 's Advantages
Released 4 years and 10 months late
Higher specification of memory (2133 vs 3)
Newer PCIe version (3 vs 2)
Larger L3 cache size (30MB vs 12MB)
More modern manufacturing process (22nm vs 32nm)
Intel Xeon X5660 's Advantages
Higher base frequency (2.8GHz vs 2.2GHz)
Lower TDP (95W vs 105W)