Have a look at the BIOS settings again, and look for anything that will tell it to look to the IDE drive to boot. Make sure that the IDE drive is cabled or jumpered as the master. Since you've got a motherboard with lots of SATA and one IDE, I'm guessing the IDE master is set to cable select, which means you want to try changing the drive to the other connector on the IDE cable. You're trickling the info out, I see: as GG says, you need to tell us the motherboard type for best results.