I use a GVP 030 board with a flash HDD on an A500 PSU (~60w). I think the A1200 PSU is ~23w, which is too low, especially using a mechanical HDD (not used one in years but hey). I do have a converted ATX PSU but the fan noise is annoying, although I think i could slow down the fan to make it quieter - its not like the Amiga is pulling anywhere near 250w, I just can't be bothered! A500 bricks is the best solution for mid-range A1200's IMO.