After upgrading to RC8 from 4.7 I have the same issue. I can't run SAB, sickbeard, and couchpotato server at the same time. They will all crash within a minute or so of starting up and running for a bit. I'm going to try RC5 so we'll see. Just thought I'd throw my hat in so you're not alone.
How would you rate the noise level of the components in the 3+ drive micro system? So, that would factor in the Corsair Builder PSU, the 2 Rosewill 120mm fans, and the Sempron fan? I want to know to determine if I'd have to opt for a different PSU or replace the other component fans for something close to silent.