Intel Xeon D 1537 's Advantages
Released 5 years and 8 months late
Newer PCIe version (3 vs 2)
Lower TDP (35W vs 115W)
Opteron 6168 's Advantages
Higher specification of memory (DDR3 vs DDR3)
Higher base frequency (1.9GHz vs 1.7GHz)
Larger L3 cache size (12MB vs 1.5MB)