You should be able, though it doesn't say anything in the board specifications. If you change the sata mode from ahci/ide to raid the you can. After you've cahnged the sata, exit the bios and repedly press ctrl+i.
Once, you've created your raid, you'll need to reinstall windows if you didn't load the raid preinstallation drivers at installation.
You can but keep in mind you cannot have a 4 drive RAID 0 configuration. The PCH only has 2 SATA 6G ports. While there are additional controllers they are not mapped into the RST ( Storage controller firmware ). As such if you want to have a RAID 0 with 4 drives you would need to span it across 4 of the 6 PCH ports ( 2 6G and 2 3G ports ). Keep in mind though the risk of a complex raid like this is high.