Intel Xeon E5645 's Advantages
Lower TDP (80W vs 95W)
Xeon E 2186G 's Advantages
Released 8 years and 2 months late
Higher specification of memory (2666 vs 3)
Newer PCIe version (3 vs 2)
Higher base frequency (3.8GHz vs 2.4GHz)
More modern manufacturing process (14nm vs 32nm)