[cianwill]

I have 2 drives and processor fan on external power supply and 2 drives, MOB and exhaust fan on original power supply. Basically evenly distibuted (I think). I am just getting ready to start the 4 disk raid 5 build. My next test will be after the build completes (which will probably take until tomorrow night) - I plan to see if I can run it back on the original PS. If the power constraint is only when building the array that will be awesome. Like I said before, it has been running with these drives fine individually so far. It was just refusing to build the array. We shall see....