NVIDIA has issued a fix named NV121906[4] in late December 2006 for 680i SLI motherboards.
This hotfix was released because users have reported disconnect or write error issues with Serial ATA disk drives on their nForce 680i motherboards.
System instability is observed in the following ways (not a complete list): To address them, BIOS updates were released for some NVIDIA nForce 680i SLI based motherboards that eliminate those symptoms.
Affected motherboards include: This update is supposed to improve system stability and prevent future stability issues related to SATA disk drives on those systems requiring this hotfix.
Also, NVIDIA has stated that this upgrade will preserve the user's current computer settings.