Newly installed SSD, but not sure AHCI is working.

Edit: Solved by installing AMD chipset drivers, which updated the SATA AHCI drivers.

Installed a new SSD (Samsung Evo 250GB). No HDD plugged in.

Motherboard is a Gigabyte 890gpa-ud3h (3 years old?).

SSD plugged into SATA 3.0 port #0.

First set BIOS to AHCI mode (although ports 5-6, which has DVD drive, is set to "as type IDE". otherwise it wouldn't recognize the windows install disc).

Installed Windows 7 SP1.

Installed Samsung Magician: it claims AHCI Mode is Deactivated. Also, "SATA Interface: N/A - unable to detect SATA interface details". Uh oh.

Checked Device Manger, under IDE ATA/ATPI controllers, I don't see AHCI anywhere:

• AMD Sata controller

• ATA Channel 0

• ATA Channel 1

• Standard Dual Channel PCI IDE Controller

Check the registry, "msachi", and I see "Start: 0x00000000 (0)" which allegedly means AHCI is working?

Question: how can I tell if AHCI mode is installed and working properly? Why is Samsung Magician not seeing it? Should I be worried Device Manager lacks a AHCI? Is my motherboard too old for this new stuff?

I've done my best to make sure everything is updated, but it's possible I missed something.

Thanks for reading!