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Was thinking they'd be running b350 or the z equivalent, though if it's b450 then yeah with a bios upgrade they might be able to run 5000 series, can confirm you do loose the first gen support which is why amd stopped giving 1st and 2nd gen cpus in their startup kitsB450 boards support all ryzen chips although I believe you lose 1st gen support if you want to run 3000/5000 series CPU after updating the bios unless you have a B450 Max board which supports all generations concurrently.