Hardware Secrets posted a list of all Sound Blaster X-Fi models released to date and how to add SPDIF connectors to them.

Creative Labs has always been one of the most popular manufacturers of sound cards and Sound Blaster X-Fi is their current series of add-on sound cards. Due to the massive amount of readers asking us how to use the digital audio (SPDIF) output from their Sound Blaster X-Fi sound cards in order to connect them to their home theater receivers or digital speakers, we decided to compile this short tutorial listing all Sound Blaster X-Fi models released to date and the available options for SPDIF connection.

How to Use the SPDIF Output from Sound Blaster X-Fi Sound Cards