Do you want to connect both EIDE and Sata drive together?
If you install both IDE/EIDE and SATA hard drives in the 8300, the SATA drive needs to be the boot C:/ drive.
If you want to replace the EIDE drive with the Sata drive, please enable SATA in the BIOS using the steps mentioned below:
1 Turn on the computer and start tapping the "F2" key until it says Entering Setup.
2. The BIOS Setup Utility window will appear where you can scroll down to "Drive Configuration" using Up and Down arrow keys. Press Enter
3 Locate and verify the Primary SATA and Secondary SATA drives. The default settings should be set to "Auto." If these are disabled, scroll down to Primary and Secondary SATA drive options and change it to Auto
4 Press "Esc" on the keyboard to exit. Choose "Save and Exit"
As rightly suggested by "RMT2", please check if the hard drive is detected in the BIOS after making the necessary changes.
Thanks & Regards