Optimized for Immersive Gaming Action through Precision Audio. The Xonar DGX sound card combines Dolby Headphone 5.1 high definition surround with ASUS" own GX 2.5 gaming audio engine and an on-board headset amplifier. These result in accurate and deep audio that brings every nuance and sound across fully, making the new Xonar DGX an ideal sound card for gamers who want to remain totally aware of their play environments.