I have an AMD FirePro W5100 installed in my computer. I have 4 monitors connected. 1 is a 4K Samsung connected through displayport, and the other 3 are 3 matching samsung 1080P monitors connected via passive displayport to HDMI adapters. All 4 screens have FreeSync on board. I have it enabled in all of the monitors OSD's. I have Radeon Pro and AMD FirePro Software Version 16.2. (2016.1004.2047.35575). On the display tab I have FreeSync turned on for the single 4K monitor connected through DisplayPort and for one of the 3 matching monitors with the passive adapter. I can't turn it on for the other two screens. It says that it is not supported. Those two screens are also coming up as DVI-D connections instead of HDMI like the working one. I have attached a screenshot.
Any suggestions, help, or insight?