Anyone know the answer to the above question? It would be on an older Intel 955 chipset MB, 32-bit XP Pro, 2GB, Pentium D 900 series 2.8GHz. Would setting the MB Bios to SATA, AHCI, "F6" SATA Driver installation when installing WinXP, etc. vs. just leaving it at "Enhanced IDE" make any real-world day to day performance difference? Just curious.