Intel Xeon D 1577 's Advantages
Released 5 years and 11 months late
Higher specification of memory (4 vs 3)
Newer PCIe version (3 vs 2)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (45W vs 80W)
Intel Xeon E5645 's Advantages
Higher base frequency (2.4GHz vs 1.3GHz)
Larger L3 cache size (12MB vs 1.5MB)