Although the new NAXN ADV 650 W has several rather positive facets, like high efficiency throughout its entire load range, resilience to high operating temperatures, a good quality finish, small dimensions, and flat cables, it ultimately doesn't maintain the initially good impression by performing poorly during the Cross Load tests I conducted. The main culprit for the unit's bad performance during highly unbalanced loads amongst all rails is its group regulated scheme; it cannot operate properly under extreme conditions. So, during the aforementioned tests, the +12V rail failed to keep its voltage within the specified ATX range. Another thing that bothered me was the very low hold-up time that barely exceeded 11 ms. This may only concern users that support their PSUs with UPS devices, but I would like to see a minimum of over 14 ms here. Finally, the choice of capacitors in the secondary side is definitely not the best. The lowest acceptable quality of caps in a good PSU is, in my opinion, TEAPO, and only if the budget prohibits the use of Japanese caps.

I really think Enermax and CWT should, given the performance of this unit, take another look at the design to make all the necessary modifications to fix the +12V rail's performance during high loads, the unit's cross loads performance, and its response to dynamic loads; and they should definitely get rid of the low quality caps in the secondary side.