Dell OptiPlex GX270 - Manual (Page 111)

3. Install the hard drive into the computer by gently sliding the drive into place until you hear it securely click.
4. Connect the power and hard-drive cables to the drive.
5. Check all connectors to be certain that they are properly cabled and firmly seated.
6. Close the computer cover.
7. Attach the computer stand (optional).
8. Connect your computer and devices to electrical outlets, and turn them on.
See the documentation that came with the drive for instructions on installing any software required for drive operation.
9. If the drive you just installed is the primary drive, insert a bootable floppy disk into drive A.
10. Turn on the computer.
11. Enter system setup , and update the appropriate Primary Drive option (0 or 1).
12. Exit system setup, and reboot the computer.
13. Partition and logically format your drive before you proceed to the next step.
For instructions, see the documentation that came with your operating system.
1 drive
2 bracket rails (2)
3 screws (4)
NOTICE: If you are installing an IDE hard drive, match the colored strip on the cable with pin 1 on the drive (pin 1 is marked as "1").
IDE Serial ATA
1 power cable
2 hard-drive cable
NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug it into the computer.