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Board choice on B760 turns on four things: which memory type the model takes, how the PCIe and M.2 lanes are wired, how much power delivery the processor you have in mind needs, and whether the firmware on the shelf already knows your CPU. None of those are visible from the chipset name, because they vary from model to model.
The chipset itself sets the boundaries. It connects to the processor over a DMI 4.0 link, provides its own PCIe 4.0 and PCIe 3.0 lanes for storage and expansion, and permits memory tuning while leaving CPU multiplier control to Z-series boards. Everything else, from networking to the number of M.2 slots, is a decision the board maker took.