https://wccftech.com/amd-adding-hdr-to-freesync-2-rebrand-now-titled-freesync-2-hdr-and-increases-minimum-hdr-requirement/

Ryan over at PCPer recently did an interview with AMD where a rep mentioned changes to AMD’s FreeSync program. Basically what we saw was the company had found that some consumers are getting confused regarding what features FreeSync 2 delivers specifically over its first-gen counterpart. Since this was an understandable problem,  they have gone the route of renaming the technology to FreeSync 2 HDR conveys the focus on the new feature-set: LFC (Low Framerate Compensation) and the FreeSync 2 HDR fast-lane for tone-mapping improvements.

The AMD rep in question further clarified on what specifications are required for a monitor to receive FreeSync 2 HDR certification: support for at least HDR600, coverage of 99 percent of BT.709 and 90 percent of the DCI P3 color spectrum. Also mentioned that there was a minimum response time, though what the exact value is remains unknown to us.