Depending on your operating system, you can try these sources: Legacy Systems (Windows 9x/NT4/XP):
If you cannot find the manufacturer, use Windows to find the exact driver: Ezhou Pci Sound Card Driver Downloadl
Before you can download the correct driver, you must identify the chipset. You can do this without opening your computer case by using the Device Manager. Right-click the Start button and select Device Manager. Expand the Sound, video and game controllers section. Depending on your operating system, you can try
Driver defaulting to 2-channel stereo. Fix: Open the C-Media control panel. Change Speaker Mode from "2 speakers" to "5.1 speakers" or "7.1 speakers." Then run speaker fill test. Depending on your operating system