I tried one of these (5V) to power a hub with a single stick+fan. With rare exception, couldn't get the stick to mine. http://www.meanwell.com/mw_search/SP-150/SP-150-spec.pdf
Went back to the 3 amp wort that came with the the hub and everything fired up hungrily.
Is there something about this power supply's specs that stand out as to why it 'may be inappropriate' for this purpose?