That may explain why I could not find a link to AuraSync on the TUF B350M Gaming board's website. (I'm installing a Wraith Max cooler and wondered if I could use the USB cable or not)I don't think there's any limitation to 400, AFAIK.
There would need to be AuraSync compatible devices attached though, as IIRC, the TUF lineup has no onboard controllable lighting.