Unable to get AHCI driver working on a Gigabyte GA-MA790GP-UD4H

I have a GA-MA790GP-UD4H gigabyte board, latest bios and a new WD raptor 10K drive. I have download the AHCI driver for Win7 64bit.

So I set my bois to use AHCI and when booting I see the AHCI bios and it sees my driver.

So I boot the install for win7 64bit and when I get to the harddrive choice section, I choose load driver to load my ahci driver. It finds my drivers and I believe it loads it. But when I tell it to install, it says it can't write the partition to the driver. But I format it fine , but the install just won't continue.

What am I missing?
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IanThConnect With a Mentor Commented:
you usually dont need an ahci driver as thats a native 'ide' port so if your bios is setup as ahci windows should see the drive without any additional drivers
noxchoGlobal Support CoordinatorCommented:
Make sure you didn't select RAID mode in BIOS. If you are able to partition the drive in Windows 7 installation wizard then it does see the drive. How does the error message sound exactly?
rdefinoAuthor Commented:
So, what your saying is I should be able to set the sata port for ahci in the bios and just install win7? I don't need to load and ahci drivers?
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noxchoConnect With a Mentor Global Support CoordinatorCommented:
Exactly. AHCI driver is already in Windows 7 installation and I have installed it in AHCI mode many times already.
rdefinoAuthor Commented:
Ok, the message I get when installing win7 after enabling ahci in the bios is:

Setup was unable to create a new system partition Or locate an existing system partition. See setup logs.

What I have in the window is the disk 0 unallocated space 139.7GB.
rdefinoAuthor Commented:
Fixed. Needed to remove my raid card first. Weird.
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