AMD Ryzen 9 3900XT 's Advantages
Released 1 years and 11 months late
Higher specification of memory (DDR4-3200 vs DDR4-2933)
Newer PCIe version (4.0 vs 3.0)
Higher base frequency (3.8GHz vs 3.0GHz)
Lower TDP (105W vs 250W)
AMD Ryzen Threadripper 2990WX 's Advantages
Larger memory bandwidth (87.42GB/s vs 47.68GB/s)