Hey, I was assuming that since Photoshop doesnt really require that much of intense GPU work, the Mac Mini did not use the AMD GPU for this? I think there are some apps that alow you to use the AMD GPU for 24/7.
This is not true.
Photoshop doesn't require the GPU that a 3d app or game would, but it definitley takes the GPU and the VRAM. If you have istat menus, you can see how much VRAM you are using. Photoshop maxes that out almost instantly.
Plus, when you have a semi-large file with LOTS of layers, the 2d redraw and zooming/moving gets REALLY slow. I do UI design, so I might have a hundred layers. It CRAWLS. The type tool grinds to a halt, and like I said any zooming or moving the canvas around is choppy and tears.
This is the same on the MBA and the Mini. Even on the maxed out Mini with an SSD, photoshop was just too annoying for UI work. Maybe for photos it's not as noticable. But for UI, I am constantly zooming in and out from, moving around the canvas, making layer after layer, dragging groups of dozens of layers and copying them around. It's just too much for the weak non-imac, non-macpro GPU's.