Intel Xeon E5 1691 v3 's Advantages
Higher base frequency (2.5GHz vs 1.9GHz)
Larger L3 cache size (35MB vs 15MB)
Xeon D 2712T 's Advantages
Released 7 years and 5 months late
Higher specification of memory (2667 vs 2133)
Newer PCIe version (4 vs 3)
More modern manufacturing process (10nm vs 22nm)
Lower TDP (65W vs 135W)