Xeon E5345 's Advantages
Lower TDP (80W vs 140W)
Intel Xeon E5 1607 v3 's Advantages
Released 7 years and 10 months late
Higher specification of memory (DDR4-1866 vs DDR3
Depends on motherboard)
Higher base frequency (3.1GHz vs 2.333GHz)
More modern manufacturing process (22nm vs 65nm)