Never had a PSU or anything else go out in my 5 rigs and I've been at it since early 2011.

Only casualty was a fan bearing on a 5830.

Though, I do use a battery backup on each machine, with a line conditioner, and load switcher to industrial outlets.

I also use ferrite chokes on all my power cables.



But maybe I am paranoid.


Tripp Lite 2400w line conditioner - http://www.amazon.com/gp/product/B0000514OG/ref=as_li_ss_tl?ie=UTF8&camp=1789&creative=390957&creativeASIN=B0000514OG&linkCode=as2&tag=sdkw38-20


Ferrite Chokes - http://www.amazon.com/Ferrite-Core-Cord-Noise-Suppressor/dp/B0002MQGEK/