The PSU question was directed at organicpuzzle.
Although...
in response to your post, xmas, reading your post again reminded me of the interesting way my MB, Asus P5LD-2, manages HDDs and HDD channels. It doesn't list my SATA devices as SATA, instead when its posting, it lists all SATA channels/devices as IDE channels in addition to listing all typical IDE channels. I also don't recall needing SATA drivers for XP during install, which was nice ^_^ It may be that your MB simply disables your sec IDE channel when SATA is being used.