Intel Xeon E5 2643 's Advantages
Newer PCIe version (3 vs 2)
Higher base frequency (3.3GHz vs 2.2GHz)
Larger L3 cache size (10MB vs 8MB)
Opteron 4310 EE 's Advantages
Released 9 months late
Higher specification of memory (1600 vs 3)
Lower TDP (35W vs 130W)