Thanks for pointing me there, the case used by the Purget System is an Antec ISK-110
A 20-pin plug should be fine since i won't exceed the 10A ATX spec on each rail.
My only concern is the 3,5'' HDD may exceed the PSU rating for the 12V rail, so i'm trying to estimate that:2A is required for the drive spinup
+ 5A for the rest of the system, so i guess the picoPSU-90 is not fine (rated 5A max).
Since it won't be installed in a space-constrained case, do you think using a bigger PSU board like this
will help dissipate the heat better?