Intel Atom x7405C 's Advantages
Released 15 years and 7 months late
Higher specification of memory (4800 vs 667)
More modern manufacturing process (10nm vs 45nm)
Lower TDP (12W vs 90W)
Xeon E7420 's Advantages
Higher base frequency (2.133GHz vs 1.7GHz)
Larger L3 cache size (8MB vs 6MB)