Intel Xeon D 1540 's Advantages
Released 3 years late
Higher specification of memory (4 vs 3)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (45W vs 80W)
Intel Xeon E5 2637 's Advantages
Higher base frequency (3GHz vs 2GHz)
Larger L3 cache size (5MB vs 1.5MB)