a) I was sent a silver color unit by accident, from my seller, which i did not test, because i used their 15 day free returns. however, if you purchase using paypal, because paypal's policy supersedes any seller policy; you can open up a power
unit, and still return it, so i know that any silver color unit from this manufacturer, is bad quality.
do not buy any silver color unit.
b) I re-ordered a black color unit with white cables, from the same manufacturer, by immediately sending a message to my seller; after buying it, that i needed a black color unit. REVOCCASES has confirmed that a black color unit with white cables, if actually sent the correct one, is good quality. i have not tested my PSU yet, & it will be quite a long time; but with free returns,
which i can verify, i personally vouch for this : http://www.aliexpress.com/item/1005001971974182.html
do not forget to immediately send your seller that message, after your purchase.
here's proof that i actually purchased, what REVOCCASES confirmed is good quality :