AMD Ryzen Threadripper 3990X 's Advantages
Released 9 months late
Higher specification of memory (3200 vs 2666)
Larger memory bandwidth (95.37GB/s vs 41.6GB/s)
Newer PCIe version (4.0 vs 3.0)
Larger L3 cache size (128MB vs 16MB)
More modern manufacturing process (7nm vs 14nm)
Intel Core i9 9900 's Advantages
Integrated graphics card
Higher base frequency (3.1GHz vs 2.9GHz)
Lower TDP (65W vs 280W)