Try this...

I am in the process now of installing Windows 32-Bit on a CHFV motherboard, follow the process below:

First from the Asus website download the AHCI/RAID drivers to USB Flash Drive formatted in NTFS. Next extract the the compressed file using J-zip or some utility that is able to extract a ZIP file. Besure that you extract these files to the USB Flash Drive. I believe that both X86 and x64 folders contain three drivers if your computer is configure to display files of all types. Once you have completed this task move on to the steps below...

NOTE: I will assume that both the AMD as ASMedia Controllers are set for AHCI operation, if not complete that task now in the BIOS before starting

1) Turn the switch on the PSU to the 0/Off position
2) connect both the data and power cables to the SSDs to SATA Ports 1,2,3 or 4: NOTE: DO NOT CONNECT THE SSDs to SATA Ports 5 or 6
3) connect both the data and power cable to your DVD Drive, connect the DVD Drive to SATA Ports 5 or 6 (do not connect to 1,2,3 or 4)
4) power-up your system and access the BIOS and verify the following under the SATA Menu
a) your SSDs have been detected on SATA Ports 1,2,3 or 4
b) your DVD drive has been detected on SATA Port 5 or 6
5) configure the following settings in the BIOS (a&b are under SATA Configuration > SB SATA Configuration)
a) configure the SATA Port 1 to 4 for RAID operation
b) configure the SATA Port 5 to 6 for IDE operation (which sucks performance wise)
c) under the BOOT Menu find the Option ROM Messages and set for Force BIOS
6) during the POST press the CONTROL F key to access the RAID BIOS, follow the directions in the manual to create a RAID-1 volume
7) reboot with the Windows 7 media in the DVD drive; eventually the installer will complain about no storage device
😎 next insert the USB Flash Drive into a USB 2.0 (not USB 3.0) port then click on the button to select new drivers
9) browse to the correct folder and click on the button to install the driver
10) you should now be able to install to your new RAID-1 volume! Have fun!