Xeon E 2234 's Advantages
Released 8 years and 1 months late
Higher specification of memory (2666 vs 1333)
Higher base frequency (3.6GHz vs 2GHz)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (71W vs 105W)
Xeon E7 2820 's Advantages
Larger L3 cache size (18MB vs 8MB)