Xeon X3480 's Advantages
Higher base frequency (3.066GHz vs 1.4GHz)
Larger L3 cache size (8MB vs 6MB)
Pentium 1405 V2 's Advantages
Released 3 years and 8 months late
Newer PCIe version (3 vs 2)
More modern manufacturing process (22nm vs 45nm)
Lower TDP (40W vs 95W)