I got an email from BFG mentioning an updated BIOS for their 680i branded motherboard to help with the SATA disk problems users are reporting. 

Some BFG customers using the BFG nForce® 680i SLI motherboard have reported experiencing disconnect or write error issues with SATA disk drives. To address this, we have worked with NVIDIA to release a BIOS update for this motherboard that eliminates this bug. BFG and NVIDIA strongly recommend that all customers upgrade their motherboards to this new BIOS, regardless of whether or not they have experienced this bug.

BFG and NVIDIA strongly recommend that all customers upgrade their motherboards to this
new BIOS, regardless of whether or not they have experienced this bug.