Intel Xeon E5 2650 v3 's Advantages
Released 2 years and 4 months late
Higher specification of memory (DDR4-2133 vs DDR3)
Larger L3 cache size (25MB vs 20MB)
More modern manufacturing process (22nm vs 32nm)
Intel Xeon E5 4640 's Advantages
Higher base frequency (2.4GHz vs 2.3GHz)
Lower TDP (95W vs 105W)