AMD Ryzen Threadripper 3990X 's Advantages
Larger memory bandwidth (95.37GB/s vs 83.2GB/s)
Larger L3 cache size (128MB vs 64MB)
AMD Ryzen 9 7900X 's Advantages
Released 2 years and 8 months late
Integrated graphics card
Higher specification of memory (5200 vs 3200)
Newer PCIe version (5.0 vs 4.0)
Higher base frequency (4.7GHz vs 2.9GHz)
More modern manufacturing process (5nm vs 7nm)
Lower TDP (170W vs 280W)