386
Former Intel CPU engineer details how internal x86-64 efforts were suppressed prior to AMD64's success
(www.tomshardware.com)
This is a most excellent place for technology news and articles.
True you've got a point, but i don't think there's gonna be many reference designs simply because AMD is cutting expenses as much as possible by selling fabs in the past, simplifying merchandise lineup now, and i guess they'll outsource as much as possible to non-reference manufacturers as a part of existence cutting measures, they also include outsourcing manufacture to tsmc in the past and opensourcing most of their software stack so community would step in to maintain