If this helps, the 680i is notorious for instability and failure 'problems'. The 7xx series, 750i, 790, were much better. 65nm C2D/C2Q depending on BIOS support (like the e6750). If quads, the Q6600, 6700. The board was released before 45nm CPUs were and likely are not supported at all. So, finding the BIOS versions and CPU support list would list specific CPU/BIOS support. The e6750 is very good for that chipset.