"So it will be interesting to see how many tier-1 suppliers (Dell, HP etc) ship these and in what volumes."
Not sure if our company would be classed as Tier-1 or not (probably not) but we just launched our own range of AMD based kit here in the UK for the first time in many years as an official AMD partner. We also sell Tier-1 brand name kit. I'd guess Tier-1 means global sales, which we don't do.
Anonymous because I'm not in marketing and am not mention brands :-)