Question: I installed a SATA hard disk and a CD/DVD drive on 775Twins-HDTV/P4Twins-HDTV, connected the hard disk to SATA1 connector and the CD/DVD to IDE1. Enabled "ATA Combination Mode" in BIOS settings. But the motherboard could not detect the CD/DVD drive. Why?(3/20/2006) Answer: Please connect SATA hard disk to SATA1 connector and CD/DVD drive to IDE2. When you enable "ATA Combination Mode", only SATA1 and IDE2 connectors can work, other connectors are disabled. We recommend you to disable "ATA Combination Mode". In that case all 4 SATA and 2 IDE channel can work, and you can get the advantages of SATA hard disks.