Intel Xeon E5 2660 's Advantages
Released 1 years and 1 months late
Newer PCIe version (3 vs 2)
Higher base frequency (2.2GHz vs 2.133GHz)
Larger L3 cache size (20MB vs 12MB)
Xeon L5639 's Advantages
Higher specification of memory (1333 vs 3)
Lower TDP (60W vs 95W)