Kyle2k,

For an NVidia card and assuming your OS is set up the same as mine:

• Right-click on the desktop and choose "NVidia control panel"
  
• Under "3D Settings" on the left, select "Manage 3D settings", then select "Program settings" among the tabs on the right
  
• Next press "Add" and then wait for a while until the "Select a program" window appears
  
• Click "Browse" and then select the location of the "javaw.exe" file (mine is in the "runtime\bin" folder of the Sweet Home 3D installation location); you may need to search for that file though.
  
• Click "Open" to close that window.
  
• Under "2." of "Program settings", choose "High-performance NVIDIA processor"
  You should now have much faster 3D refresh rate.