New mobo. Boots ok from SATA drive with XP as long as PCI Ultra/ATA controller card is not installed. Trying to get IDE drive access, machine will not boot from IDE drive without OS. OS is on SATA drive. Mobo locks during boot at "ACPI Controller' when ATA card installed. Take out card, machine boots. I've tried removing power from other drives, no change. Am using 485W power supply. Help is appreciated.