Intel Xeon E5 2640 v2 's Advantages
Released 1 years and 6 months late
Larger L3 cache size (20MB vs 10MB)
More modern manufacturing process (22nm vs 32nm)
Intel Xeon E5 2609 's Advantages
Higher base frequency (2.4GHz vs 2GHz)
Lower TDP (80W vs 95W)