AMD Ryzen 7 3800X 's Advantages
Higher specification of memory (DDR4-3200 vs DDR4-2933)
Larger memory bandwidth (47.68GB/s vs 43.71GB/s)
Newer PCIe version (4.0 vs 3.0)
Higher base frequency (3.9GHz vs 3.7GHz)
Larger L3 cache size (32MB vs 4MB)
AMD Ryzen 5 3400G 's Advantages
Integrated graphics card
Lower TDP (45W vs 105W)