Intel Xeon E5 1680 v2 's Advantages
Released 2 years and 5 months late
Higher specification of memory (DDR3-1866 vs DDR3)
Larger L3 cache size (25MB vs 8MB)
More modern manufacturing process (22nm vs 32nm)
Intel Xeon E3 1280 's Advantages
Higher base frequency (3.5GHz vs 3GHz)
Lower TDP (95W vs 130W)