Intel Xeon E5 2640 v3 's Advantages
Larger L3 cache size (20MB vs 16MB)
Lower TDP (90W vs 95W)
Intel Xeon E 2388G 's Advantages
Released 7 years late
Higher specification of memory (DDR4-3200 vs DDR4-1866)
Newer PCIe version (4 vs 3)
Higher base frequency (3.2GHz vs 2.6GHz)
More modern manufacturing process (14nm vs 22nm)