Hi,
You need to first ensure you have the latest drivers for your video card. This is from the FAQ:
To enable ATI Stream technology in CyberLink PowerDirector, you must first make sure the latest driver for your graphics card is installed. You can get the latest driver on ATI's website (ATI Catalyst™ 8.12 Display Driver or above):
http://ati.amd.com/support/driver.html
For ATI graphic cards, we strongly recommend that you install the additional package “Avivo” to enable ATI Stream. This package can be downloaded from the ATI website:
http://game.amd.com/us-en/drivers_catalyst.aspx.
Once that is done and computer is rebooted, go to the Editing tab in Preferences and enable it under GPU encoding.
If other users have insight, please help
Thanks
David