Quote: Originally Posted by JIMT
I went into setup and the drive did not show in boot list.
As was suggested, have you checked or changed all cables... SATA (data) as well as power supply cable going to the new drive? All connectors pressed in firmly, to drive and motherboard?
Maybe just for an experiment, swap the known-working data/power cables that go to your second SATA drive, temporarily connecting them to your new third drive. Again, get into BIOS setup at boot time and see if the third drive is now visible in the HD list and/or boot sequence configuration for choosing.
Is there a BIOS setting that limits or sets the max number of active SATA connectors on the mobo?