Which model of amiga are you using this in?
I have 3 Indivision ECS (and 1 AGA MK2). I find that Indivison needs really clean power. This was particularly an issue with my A500+. The screen would tear and distort especially if you use the floppy drive (the floppy added noise to both 5 V and 12 V lines). I switched from an A500 Obese Boy (sorry not a politically correct name) to one of my XT power supplies modded for an A500. Now everything works great.
