Having trouble finding which driver you need to install for SATA on the Dell Optiplex 780? Yeah me too. So after much trouble and lack of documentation on Dell’s website I figured I’d post it here after finding it on a Russian web site. For the record I was installing XP Pro 32-bit (for work). Had this PC not been a ‘test’ PC it would be running Windows 7.
And yes I put in the freakin’ service tag at Dell’s website.
In the BIOS it comes by default set to ATA instead of AHCI.
You need to install the Intel ICH10D driver.
With the proper SATA driver installed you can reboot and change it to AHCI and it will boot. Without the proper driver and set to AHCI the box will simply blue-screen and constantly reboot until you switch it back to ATA or throw it on the ground.
Hope it helps someone else.