Not very detailed but the driver versions have changed like so: GART driver 3.77 (WHQL) --> GART driver 4.36 (WHQL) IDE NVIDIA driver 4.12 (WHQL) --> IDE NVIDIA driver 4.46 (WHQL) Also these little release notes: # Unified drivers with support for nForce, nForce2, and nForce3 products, including support for dual-processor systems. # General compatibility fixes # Audio Driver Improvements * Addressed audio issues in numerous games and applications # Storage Driver Improvements: * RAID Morphing * Improved RAID Interface * RAID spans both SATA and PATA devices * RAID 0, 1, and 0+1 * Improved handling of various storage devices

Msi K8N Neo Platinum great sound Drivers, very big difference, Audio Utility Nvmixer shows proper Audio driver installed. better performance on IDE.

Asus A7N8X Deluxe 2.0 1007 Uber BIOS FINALLY PlexTools Professional is totally functional with this mobo and chipset!!! A must-have driver upgrade for anyone with a nforce mobo and Plextor drives that use PlexTools. Haven't timed anything but some burning (Nero) and other apps appear to be running a LOT faster now and not a single "burp" yet...

Check in the bios to see if it's enabled or disabled. Also check in the volume settings in the control panel to see if it is muted.