so you won't need to upgrade if you've got a Ryzen 7000 system already. X670E offers PCIe 5.0 throughout, X670 offers PCIe 5.0 for storage and graphics, and B650 offers PCIe 5.0 for storage only.
The AM5 socket used by Ryzen 7000 only supports DDR5 memory, and I've narrowed the picks further with 6000MHz speeds, CL30 timing, and AMD EXPO overclocking compatibility for optimal performance.