I can't find any b350 motherboards to also have an m.2 key e slot for a wifi card and simply wondered whether this is compatible with amd CPU's and if so what motherboard supports it?
That's going to be a motherboard feature rather than a CPU feature. The B350 motherboards are more budget oriented boards, so finding a more advanced feature on them is doubtful. The ASRock Fatal1ty X370 Gaming K4, however, is a board which states support for M.2 Key E.
Thanks hadn't thought of the higher series boards
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