Intel Xeon E5 2643 v3 's Advantages
Released 1 years and 3 months late
Higher specification of memory (DDR4-2133 vs DDR3)
Larger L3 cache size (20MB vs 8MB)
Intel Xeon E3 1275 v3 's Advantages
Higher base frequency (3.5GHz vs 3.4GHz)
Lower TDP (84W vs 135W)