In hindsight I suspect the whole RTG separation from AMD thing was to allow this partnership with Intel to happen. Maybe Intel said 'we want your graphics so long as it's not branded AMD' and as a result RTG was born (they should have taken the opportunity to ditch the 'Radeon' which sounds like a box of detergent).
I think it was more because at the time the Radeon wing was supporting the CPU side of the company.
Maybe AMD was aware of the flaw in Intel chips and said we'll build you a GPU aslong as AMD is associted with Intel CPU's.
