...even though it's listed as one of the tested cards by Adobe.
Windows 10 is updated, Drivers are updated, but the "Use Graphics Processor" option is greyed out on Photoshop CC 2017 and the card is not listed under Detected Graphics Processor either.
Yea so turns out this is just the classic missing "Radeon Additional Settings" bug that we are all suffering from in the latest drivers.
The workaround I use is to turn off Intel Graphics in the Device Manager before opening Photoshop, then turning it back on while Photoshop is open. Photoshop will automatically resort to that card and keep resorting to it even after you turn your cpu graphics back on. This is the whole point of going in to settings to make sure Photoshop picks that card be default so that I wouldn't have to go in to Device Manager every time. So now I wait on AMD...