my question is what is the diff in the serial ATA and the ultraDMA hard drives is one better then the other ill be using an ASUS KT600 Model "A7V600 motherboard suports two UltraDMA 100/133 devies also the board has Onboard SATA/RAID: 2x Serial ATA with RAID 0,1 which one is the best IDE or SATA why is sata more costly of the two which one should i choose im sorry my english is bad thanks for the help