I just bought a second-hand Dell Optiplex 330, Core2Duo 2.2GHz with G31 & ICH7R, which has a fresh installed Windows 7 Home Premium. The specifications sheet from Intel said ICH7R supports both RAID 0 & RAID 1.
In the BIOS, the SATA mode is set to RAID, at the CTRL+I menu after the POST screen only allows me to create RAID 1 volume. I've plugged in 3 combination of HDD, 80GB, 320GB and 640GB.
After installing windows on the 80GB, I tried to use both the Intel Matrix Storage Console and the later version of Intel Rapid Storage technology, neither would allow me to create a RAID 0 volume. The combo-box only shows RAID 1.
Updating the latest driver and latest BIOS also doesn't help.