Intel Xeon D 1557 's Advantages
Released 3 years and 3 months late
Newer PCIe version (3 vs 2)
Lower TDP (45W vs 85W)
Opteron 6366 HE 's Advantages
Higher specification of memory (DDR3 vs DDR3)
Higher base frequency (1.8GHz vs 1.5GHz)
Larger L3 cache size (8MB vs 1.5MB)