Well the 650a drivers don't work. that is for x64. I noticed when installing Vista 64bit drives the install was installing from x86 directories HD Deck does not run after install and a reboot. Go to control panel sound and only thing list is speakers setting when you try and configure 5.1 in my case I get format is not supported by device error. However if I uninstall the driver,and roll it back todriver that installed when I installed Windows 7 7100 I can configure to use speakers 5.1 setting. Just no Spdif setting a HDMI setting is there but only list 2 speakers no support for 5.1 or 7.1. I have a Asus M3A78 MB with 9950 Qaud core 4 GB Ram 3X250 Seagate Sata II HD's running Raid 0 3850 ATI Graphics Card. And just to let you know I have tried the 690a driver from Asus's site with same result Never have been impressed with VIA audio since I owned this MB. Even under Vista Ultimate 32 bit drivers and software seems quirky and very hard to get setup properly especially when tring to use 5.1 either speaker or spdif.
Willing to try more things if someone has other idea to try but for now I'm rolling back to driver that installed when I install Windows 7. Oh and this is my second go around with Windows 7 first time was w x86 32-bit version and had alot more driver issues with it, But with current version all drivers installed except VIA audio w Windows update. Just wish I could get spdif to work cause I wand Dolby, Prologic Sound. Logitech Z5500 Speakers.