Since you have both chipsets on the board intel + jmcron you can disable the jmicro chip.
Ok when windows 7 INSTALLS if you have AHCI enabled in the bios under sata configuration or drive configuration - Windows 7 automatically installs the intel driver, however, for full functionality you need to download the intel matrix storage manager software. You don't need to install anything during installation, but check to make sure AHCI is enabled in the bios. If it isn't you can still fix it, but you will need to go here and follow the instructions, Error message when you start a Windows 7 or Windows Vista-based computer after you change the SATA mode of the boot drive: "STOP 0x0000007B INACCESSABLE_BOOT_DEVICE"
otherwise, download the matrix software from below link :
You will find it at the intel site - http://downloadcenter.intel.com/default.aspx
Select chipsets - chipset software - intel(R) matrix storage manager - Select Operating System - select Windows 7 (64bit OR 32 bit) - select drivers - select intel(R) matrix storage manager 184.108.40.2063 - download and install.
(make sure you don't download the floppy configuration utility by mistake) - it will show up if you select utilities.
With the microsoft fix it if you find you havnt AHCI enabled in the bios prior to installing Windows 7 you dont need to install the matrix software the microsoft driver works fine.