According to AMD this generation should work with x370 after a BIOS update. So you would need to check to make sure the latest BIOS supports 3rd gen. If not then you need to wait.
I've also heard that newer boards might improve memory overclocking with better traces, etc. So if you are having memory issues you might end up needing to upgrade the board as well. No harm starting with the CPU though and worrying about the board later.
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