Riotoro's Onyx 650W is a budget-oriented PSU. It's based on an advanced platform that isn't very efficient, but it's packed with solid performance per dollar.

Riotoro is a new company trying to enter the tough PSU market where big brands dominate. We already reviewed Riotoro's Enigma 850 and determined that it's essentially a clone of Corsair's CS850M, since both units are based on the same Great Wall platform. However, this company has a second family in its portfolio; the mainstream Onyx line-up consists of two members with 650W and 750W capacities. The lower-level Onyx power supplies also employ a Great Wall platform. It isn't as efficient, but it does cost less.
Today we're reviewing the 650W Onyx model, pitting it against popular competitors in this category like Corsair's CX650M. Since we don't have many direct comparisons in our database, we're also including several mid-range and high-end products in order to illustrate the differences between mainstream PSUs and pricier alternatives.