To be perfectly honest I don't know what kind of mobo via sound cards you have, but if I had to be specific right now try the latest one as posted here.
Sorry this isn't being corrected quickly enough as it should be but we'll figure it out.
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VIA HD Audio Driver Dated: 16-Sep-2010
Download version 8700A
OS supported Windows XP, Windows XP 64-Bit, Windows Server 2003 x64, Windows Vista 32-Bit, Windows Vista 64-Bit, Windows 7 32-Bit, Windows 7 64-Bit
Chips supported VIA HD Audio Codecs VT1702S, VT1705, VT1708B, VT1708S, VT1716S, VT1718S, VIA HD Audio Codecs VT2010, VT2002P, VT2020S, VIA HD Audio Codecs VT1812S, VT1818, VT1828S
Notes The audio drivers provided on this website are general sound effect drivers with common functions. System manufacturers and motherboard vendors customize audio hardware and software and therefore, to ensure optimal sound quality and compatibility, we strongly recommend you to obtain the system-validated and certified audio drivers directly from your system manufacturer or motherboard manufacturer. If you use audio drivers provided on this website and you experience a difficulty, we recommend that you uninstall them and instead use the latest drivers supplied by your motherboard or system manufacturer.