I've read every other thread in this forum on Realtek audio drivers, googled searched dozens of times and tried everything I can think of... I'm building a new PC for a relative, I've built maybe 6 PCs in the last year for friends/relatives... every last one of them gave me headaches with the Realtek audio drivers. This machine I've been banging my head on the drivers for the last week or so. The motherboard is a Gigabyte X48T-DQ6 and I'm running Windows XP Professional x64 Edition I've tried the drivers from the included motherboard disc, the drivers from realtek's website and the drivers from gigabytes website (all completely different versions of the same drivers mind you) and none of them work properly. I've uninstalled and reinstalled the MS's UAA HD Audio driver multiple times. It seems to me that X64 uses a different UAA HD Audio driver because the KB#### is different than the one that keeps getting mentioned here, and if I attempt to install the "KB888111" driver it says that it's incompatible... Since I've installed Realtek drivers on several other machines I know that once it's running properly I should have the Realtek sound manager in my system tray... I've got to the point several times were everything "seemed" to be installed properly but I couldn't get any sound despite the fact that it recognized a device called "Realtek Rear Audio Output". FWIW one of the other machines I ended up having to re-install windows and immediately disable all sound devices, install the drivers, then re-enable the devices before things would work properly. I'm tearing my hair out over this... I'd like to avoid re-installing windows because doing so would mean I have to re-install a disc drive for RAID drivers as well but I'd like to avoid it if I have to. any help would be much appreciated.