Intel Xeon E5 2658 's Advantages
Larger L3 cache size (20MB vs 12MB)
Xeon E 2126G 's Advantages
Released 6 years and 4 months late
Higher specification of memory (2666 vs 3)
Higher base frequency (3.3GHz vs 2.1GHz)
More modern manufacturing process (14nm vs 32nm)
Lower TDP (80W vs 95W)