6 Channel 5.1 Surround PCI Sound Card C-Media 8738 6-Channel PCI 3D Sound Card Provides audio fidelity that rivals movie theaters with 5.1-ch digital sound Customize Internet audio with the power and surround sound of EAX audio technologies Enjoy compelling 3D audio and 5.1 sound on multiple speakers series 6 channel DAC for AC3 5.1 channel purpose