Intel Xeon X5660 's Advantages
Larger L3 cache size (12MB vs 8MB)
Intel Xeon E3 1515M v5 's Advantages
Released 5 years and 10 months late
Higher specification of memory (2133 vs 3)
Newer PCIe version (3 vs 2)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (45W vs 95W)