The normal route for workstation level motherboards is from the server business unit of a motherboard manufacturer, which then works its way into full systems rather than being sold separately. The other, less used alternative is for the mainstream end-user motherboard business units to develop their own and sell directly to end-users building their own workstation. While some of the motherboard manufacturers are slowly jumping on this bandwagon, ASUS has been at it for a number of generations now, with enough success to continue into their new Haswell-E designs which have just been announced.