Dual-socket Genoa would be 24 channels at DDR5-4800 (38.4 GB/s) for a total of ~921.6 GB/s. Typical PCIe configurations are 64 or 80 lanes per socket for dual-socket, so 128 or 160 lanes total, at PCIe 5.0 speed that's ~504 GB/s for 128 lanes total or ~630 GB/s for 160 lane configurations.

Single-socket Genoa would be 12 channels of DRAM (~460.8 GB/s) and 128 lanes of PCIe 5.0 (~504 GB/s), but none of the previous comments were specifically about single-socket Genoa and I wasn't going to silently switch from considering dual-socket in one sentence to single-socket in the next sentence.