SKmoon Pci-e PCI Express 6 Channel 5.1 Cmi8738 Professional Surround 3d Audio Sound Card Provides audio fidelity that rivals movie theaters with 4\6-channel digital sound System interface: 32-bit PCI express x1 Bus Master Customize Internet audio with the power and surround sound of EAX audio technology Enjoy compelling 3D audio and 4-channel sound on multiple speaker series Rich software bundled