"ProXtend PCIe Sound Cards offer 100% compatibility with all major vendors, delivering performance and functionality for the most demanding entertainment and professional applications. The ProXtend PX-AU-21565 PCIe Sound Card is fully compatible with the PCIe 1.1 interface, has embedded 8051-based MCU to transcode HD audio commands and comes with a built in HD audio controller. In addition, the PX-AU-21565 offers ASIO driver support and signal noise reduction. •7.1 Stereo Sound Card •16/24-bit audio •Recording and playback