I manage to make my rendering process a bit faster by adding the "Javaw.exe" as a "game" into my AMD Radeon Setting.

Steps are:
1. Open the AMD Radeon Software setting
2. Add Game
3. Browse for location of Javaw.exe (mine is C:\Program Files\Sweet Home 3D\runtime\bin\Javaw.exe)
4. Add JavaW.exe as a game.

Thank you so much for this; you are a lifesaver! This worked perfectly for my laptop's NVidia graphics card, and I now have a super-fast 3D view that updates in less than a second and can be smoothly panned with the mouse (updates normally took around 15 seconds previously).