Optimal Shop 8541594818 5.1 Sound Card Low Profile Bracket

5.1 PCI sound card for desktop PCs

This internal audio card adds 5.1 surround sound to a Windows desktop through a standard PCI slot. It uses the CMI8738 chip and supports 32-bit and 64-bit audio processing for playback and recording. The 16-bit multimedia decoder handles DirectSound, A3D and EAX 3D positional audio. A low-profile bracket is included for installation in 2U chassis.

Bandwidth and driver limits of the PCI interface

The card connects via a legacy PCI bus, which restricts data throughput compared to modern PCIe audio devices. Driver support is listed for Windows XP, 7 and 10 only, with no mention of Windows 11 or Linux compatibility. The published signal-to-noise ratio is 10 decibels, which is low for critical listening or recording work. Users must disable the onboard audio device in Device Manager to avoid conflicts.

5.1 channel output decides suitability

This product is built specifically for 5.1 analogue speaker sets and will not provide 7.1 or higher channel counts. It is not for buyers who need a higher signal-to-noise ratio, digital S/PDIF output or native Windows 11 drivers. Builders requiring a PCIe x1 interface or external volume control should look elsewhere.