Intel Xeon X5660 's Advantages
Higher base frequency (2.8GHz vs 2.2GHz)
Intel Xeon E5 1428L v2 's Advantages
Released 3 years and 10 months late
Higher specification of memory (1333 vs 3)
Newer PCIe version (3 vs 2)
Larger L3 cache size (15MB vs 12MB)
More modern manufacturing process (22nm vs 32nm)
Lower TDP (60W vs 95W)