I think, HD RAM modules will be supported officially by AGESA 1.0.0.7 upwards. 1003 was just a public test, which hasn't AMD's permission to be released to the public.
You need a mainboard with a specific external clock generator, an added hardware component to certain mainboards like ASUS X670E Extreme. That feature is missed on the ProArt X670e Creator mainboard.
The new "forum" can hardly be called a forum, because no overview of threads exists. This mess can hardly be called ergonomically or user-friendly. The new "forum" is broken by all means. It's a shame, that ASUS real forum was migrated to such ugly a...