The Wowza Media Server 3 Preview live stream transcoder AddOn supports accelerated video encoding. It supports both the Intel QuickSync (Sandy Bridge) acceleration as well as NVidia CUDA acceleration. Any NVidia graphics card that supports the CUDA instructions set should be compatible with the Wowza Server 3 live stream transcoder AddOn acclerated CUDA encoding. Below is a list of supported graphics cards and drivers:
NVidia CUDA GPUs
It is best to upgrade to the latest, latest graphics driver.