Intels ver 9 ahci driver is better for the SF-1200 controller SSDs than uSoft default driver.
Disconnect your Mechanical HDDs befor installing Win 7 on your SSD
Down load the "F6" drivers inaddition to the Ver 9 RST chipset drivers. Put the F6 Drivers on a thumb drive..
Select Custom install, Under screen that shows you the drives, and where you want to install Win 7, there is a small check box (should be on left side below drive screen). Check it and select the intel AHCI driver. When installation is complete you can install Ver 9 RST driver.