The CMedia CMI8738 64 Bit audio driver allows Windows to communicate with sound cards based on the CMI8738 chipset, enabling playback and recording through the card’s audio connections. When choosing a download for Windows 11, 10, 8, or 7, check that the package supports both your specific sound card and the 64-bit version of your operating system.

Key Features

• Audio playback support: Enables compatible CMI8738 hardware to deliver sound to connected speakers or headphones.
• Microphone and line-in recording: Makes supported audio inputs available to Windows and recording applications, depending on the connections fitted to your card.
• Multichannel output: Provides access to surround-sound configurations where supported by the sound card and driver package.
• Windows audio integration: Lets you select the card as a playback or recording device and adjust available settings through Windows sound controls.

How to Install

1. Confirm your hardware and Windows version. Open Device Manager and locate the sound card under “Sound, video and game controllers” or “Other devices.” If its identity is unclear, check its hardware IDs in Properties. Verify that your Windows installation is 64-bit.

1. Choose a matching driver package. Download a CMedia CMI8738 64 Bit driver that explicitly lists your operating system and hardware as compatible. Windows 11 and Windows 10 compatibility should be confirmed rather than assumed from support for Windows 8 or Windows 7.

1. Prepare the downloaded files. Extract the package if it is compressed, and close applications that use audio. If you are troubleshooting a previous installation, create a restore point before making driver changes.

1. Install the driver. Run the included installer and follow its prompts. If no installer is provided, open Device Manager, right-click the sound card, select “Update driver,” and choose “Browse my computer for drivers.” Point Windows to the extracted driver folder.

1. Restart and test the sound card. Reboot if prompted, then open Windows sound settings and choose the CMI8738-based card as your output device. Test playback and any microphone input you use. If sound is missing, check cable connections, volume levels, and the selected playback device before reinstalling.

Available audio options vary by card model and driver release. A package intended for a different CMI8738 variant may not expose the correct inputs or speaker configuration, even if installation completes.

Common Issues and Fixes

• Install fails or driver is rejected: The CMI8738 64-bit package is legacy and may be unsigned. Run the installer as Administrator, use Windows compatibility mode, and if Windows blocks it, temporarily disable driver signature enforcement. Reboot after install.
• Device not detected: Check that the CMI8738 PCI card is seated properly and enabled in Device Manager. Disable onboard audio in BIOS/UEFI, try another PCI slot, and scan for hardware changes. Look for unknown devices with yellow warning icons.
• Version conflicts or no sound: Uninstall any existing C-Media/onboard audio drivers and remove old devices in Device Manager. Install the CMI8738 driver before Windows installs a generic HD Audio driver, then set the CMI8738 as the default playback device.