Due to INTEL specification, chipset can support 4 rows with PC133SDRAM, and support up to 6 rows with PC100SDRAM. P.S: A DIMM supports 2 rows. Double side SDRAM supports 2 rows, whereas Single side SDRAM supports 1 row.
Only Intel Southbridge chipset model names that include a R/DO/DH will support AHCI and RAID functions. The function ICH8AHCI can only be enabled under Vista. If you are using Windows XP/2000 please disable the function “SATAAHCI mode” in bios.