I get a full 30fps on the airstrip on my OnePlus 3 (same Snapdragon 820 processor as your Galaxy S7). Either your CPU clock override is limiting your performance or Samsung needs to update their GPU drivers.
Edit: looking into this more, I found out the skip EFB access from CPU and ignore format changes options are inverted in the Android UI.
Edit: looking into this more, I found out the skip EFB access from CPU and ignore format changes options are inverted in the Android UI.
