Riotoro is a new player in the PC market, coming into business into 2015. The company was founded by ex-Corsair and ex-NVIDIA employees who possess the experience that is necessary for them to compete in today’s cutthroat markets. They are making slow, cautious moves towards new product releases, trying to maximize their revenue and, as a result, their growth. Their first entrance into the North American market was with the Prism CR1280, an RGB full tower case that we reviewed last April.

In this review we are having a look at Riotoro’s very first PSUs, the Onyx 650W and the Onyx 750W, which are used as proof of the company’s experience and cautiousness. These two PSUs are released in tandem with the 80Plus Gold certified Enigma 750W PSU.

Instead of releasing a high output PSU that would be impressive but targeted at a very small fragment of the market, the two newly released Onyx units are more mainstream  and are aiming to be financially competitive - not to take the market with brute force as with other brands. They are 80Plus Bronze certified and targeted towards casual gamers and/or advanced users, where the bulk of today’s home PC revenue comes from. For the time being there are only two versions of the Onyx, with a maximum output of 650W and 750W respectively.

Riotoro Onyx 650W Specifications

Riotoro Onyx 650W
Power specifications ( Rated @ 50 °C )
AC INPUT 100 - 240 VAC, 50 - 60 Hz
RAIL +3.3V +5V +12V +5Vsb -12V
MAX OUTPUT 25A 25A 54A 3A 0.8A
130W 650W 15W 9.6W


Riotoro Onyx 750W Specifications

Riotoro Onyx 750W
Power specifications ( Rated @ 50 °C )
AC INPUT 100 - 240 VAC, 50 - 60 Hz
RAIL +3.3V +5V +12V +5Vsb -12V
MAX OUTPUT 25A 25A 62.5A 3A 0.8A
130W 750W 15W 9.6W


Packaging and Bundle

We received the two Onyx PSUs into simple, effective cardboard boxes. The artwork on the boxes is simplistic, but all of the necessary information and specifications are printed onto the sides and rear of the box. Inside the box we found the PSUs simply wrapped in nylon bubble bags, without any polyethylene foam or extra cardboard packaging. While not the best shipping protection for a PSU, but it should be sufficient for the vast majority of cases.

The items bundled with the Onyx PSUs are the absolute minimum that we expect: inside the box we only found the necessary AC power cable, a few cable straps, four black mounting screws and a basic user’s manual. Both units share the exact same bundle, only the manual itself and the number of  supplied modular cables differ.

Connector Onyx 650W Onyx 750W
ATX 24 Pin 1 1
EPS 4+4 Pin 1 1
EPS 8 Pin - -
PCI-E 6+2 Pin 2 4
PCI-E 8 Pin - -
SATA 6 9
Molex 3 6
Floppy 1 1

The Riotoro Onyx PSUs are semi-modular, with the ATX and EPS cables hardwired onto the units, with the rest of the connectors on removable cables. All of the wires and connectors, including those of the hardwired cables, are black. The ATX cable is wrapped into black nylon sleeving, while the rest of the cables are “flat” ribbon-like cables. The 750W version has two extra PCI Express connectors, plus extra SATA and Molex connectors. Technically, the power rating difference does not really justify such a vast difference on the number of connectors, suggesting that Riotoro simply wanted to differentiate the target group of their two models.

External and Internal Design
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  • fanofanand - Thursday, March 23, 2017 - link

    Once upon a time I made the mistake of buying a high-end PSU from a relatively new outfit that was created by former execs and engineers from a high-profile component manufacturer. Everything seemed brilliant. Excellent power characteristics with nary a ripple, fully modular design, it seemed fantastic. Two years later it crapped out on me taking a few components with it (yes it was hooked up to surge protectors and a UPS). When I went to go back to the manufacturer whatdya know, they were already gone. I was left in the lurch with several fried components and no recourse for my warranty. Never again, I will stick with the known quantities on PSUs. It is a far more important component than many give it credit for.
  • feelingshorter - Thursday, March 23, 2017 - link

    Had a Corsair PSU years back, started making a buzzing sound closer to the end of it's warranty. Corsair replaced it but the new PSU still made that buzzing sound. Bought a SeaSonic X650 back when it first came out for for $115-$120 (expensive b/c it was the first 80 plus gold at the time) and it has been rock solid without any electronic buzzing. I agree with your statement, I can't trust a new company either. Had a Nvidia graphics card fail and the company, BFG Tech disappeared. They offered a "life time warranty" and the card was barely past 2 years. No thanks. BFG Tech also sold PSUs and I was wondering if we are talking about the same company.
  • fanofanand - Thursday, March 23, 2017 - link

    Nope, the company was Tagan, and I bought it based off this review (Gee thanks Anandtech.....)

    I had the 700 watt version as I was one of the suckers who thought my 8800 and Q6600 "needed" 700 watts. I figured if their top end version was among the best of the best, surely their 700 watt would be just as solid. Apparently not.
  • BrokenCrayons - Thursday, March 23, 2017 - link

    Anandtech and any other hardware reviewer can't really test long term reliability. They sample a single unit (potentially cherry picked by the vendor if the reviewer doesn't buy retail parts) which is never a statistically significant number and test it over the course of a short period of time. There's nothing AT can do to test for years' long operational capabilities.
  • fanofanand - Thursday, March 23, 2017 - link

    Oh I know, I'm not actually blaming Anandtech, just taking a cheap shot. :)
  • Samus - Thursday, March 23, 2017 - link

    I purchased a PC Power and Cooling Silencer 750 Quad 10 years ago based on an anandtech review. Still have it, still works, and it was on a miner 24/7 for 4 years.
  • fanofanand - Friday, March 24, 2017 - link

    Cool story but how is that relevant? PC Power and Cooling wasn't an unknown entity ten years ago.
  • Galid - Monday, March 27, 2017 - link

    That is a complete sophism, sorry it happened to you, the new kid on the block deceived you back then but that is a fallacious argument. I beleive MILLIONS peoples made money, great investments on what used to be new back in the days. My father used to invest in apple when it was new, some peeps went in to say ''this is a dangerous investment, we don't know nothing about them''. He also invested 1500$ on Bombardier back when it was a new company. He made 180k$ from that even if it was risky

    The new honda accord 2017 is worse/better than the honda accord 2016, this is an example of a sophism, you can't use that as an argument.

    If we base life on argumenting like that, maybe you shouldn't walk on the sideways, there are reports of people that died hit by a car or just slip on the ice.

    Maybe you should move from your home if you have carpet/wood in it, there are reoprtedly homes that caught fire.

    Maybe you should stop doing anything because there are reports about people getting in real danger doing just about anything in life including but not limited to: breathing, swimming, walking, looking at the sky, watching TV, sleeping, etc...
  • Galid - Monday, March 27, 2017 - link

    You know, life is risky, you won't get out of it. Don't try to dodge EVERY risky moves because well, your life WILL be boring. If you really care about risks, huddle in the corner, we'll feed you, give you protection and you'll live being 120 years old. But what a life...
  • Ascaris - Sunday, April 9, 2017 - link

    "You know, life is risky, you won't get out of it."
    You contradict yourself. If life is risky, how is he going to live forever as you say?

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