AMD Ryzen 9 5900 's Advantages
Larger memory bandwidth (51.2GB/s vs 42GB/s)
Higher base frequency (3.0GHz vs 2.0GHz)
Larger L3 cache size (32MB vs 16MB)
Loongson LS3A6000 's Advantages
Released 2 years and 10 months late
Newer PCIe version (5.0 vs 4.0)
Lower TDP (50W vs 65W)