Apple Final Cut Pro 6 - Manual (Page 1424)

Chapter 28 Using RT Extreme 639
IV
To choose software or hardware real-time effects processing for clips using
a particular codec:
1 Choose Final Cut Pro > System Settings, then click the Effect Handling tab.
Note: The codecs you see may differ from those shown here.
2 In the pop-up menu corresponding to the codec you want to adjust, choose an effect
handling method:
 None: Choosing None disables real-time effect handling for the selected codec.
 Final Cut Pro: This option uses RT Extreme, the built-in real-time processing engine
of Final Cut Pro.
 Other: If a video effects accelerator card is installed that is capable of real-time
effects processing for a particular codec, it appears in this pop-up menu. Choose this
option to have the video effects accelerator card handle real-time effects processing
for a particular codec.