Intel Xeon E3 1245 's Advantages
Higher base frequency (3.3GHz vs 2GHz)
Lower TDP (95W vs 115W)
Intel Xeon E7 4809 v3 's Advantages
Released 4 years and 2 months late
Higher specification of memory (1866 vs 3)
Larger L3 cache size (20MB vs 8MB)
More modern manufacturing process (22nm vs 32nm)