Hi @fanatic26.
Slightly confused. Are you saying that you /agree/ that using a DPS1200 like this is a bad idea?
Correct, it is a bad idea. Each hashing blade pulls ~460w, which would push a 900w psu over its rated limit. While it would work for a while because server psus are pretty beefy, running hardware out of spec for that long will eventually cause a failure of some sort.
If you could find a 1200 watt version you could run 2 of the blades off of the 1200, and the third blade + controller off of the 900w psu safely.
Do 1200W versions exist?
PS, I assume this recommendation from parellelminer for the x11 is also a bad idea?
http://i66.tinypic.com/2igehk7.jpg