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Riotoro Onyx 650W PSU Review

Final Analysis

The Onyx 650 gives us a nice surprise. We expected to see Riotoro utilizing an older platform. Instead, we found a much more modern design armed with circuits typically found in higher-efficiency PSUs.

On top of that, its selection of filtering capacitors is great for this price range. Besides electrolytic caps, a significant number of polymer ones are also used. It's only strange that Riotoro's higher-end Enigma 850 uses a 85°C bulk cap, while the affordable Onyx 650 includes higher-temperature (105°C) caps in the APFC converter. Unfortunately, due to the low combined capacity of its bulk caps, the Onyx 650 registers an unacceptably low hold-up time.

The PR-BP0650-SM's overall performance is good enough, but in our ripple suppression tests it loses to the CX650M big-time. That's Riotoro's main competitor, so it really needed to fare better. 

Riotoro is a new company, and its decision to enter the PSU market with two product families addressing mainstream and mid-range customers seems like the right move. The Onyx 650 is semi-modular. Only its necessary cables are native, and there are two eight-pin sockets on its modular panel, so you have the option to add a second EPS connector or another pair of PCIe ones if you can find the corresponding cable for sale. In any case, it is good to have an upgrade path since this PSU has enough capacity to support those extra connectors.

The Onyx 650 is based on a modern platform that's built well. Its performance is decent; however, a few items need more attention. For starters, the PSU should be equipped with larger bulk caps in order to improve its hold-up time. A more relaxed fan profile and a higher-quality fan would dramatically improve this unit's noise levels, too.

Of course, we understand that those changes would affect the PR-BP0650-SM's price tag, Bulk caps are expensive in general and a good fans aren't cheap. The only change that could be implemented for free would be an updated fan profile. Dialing it back just a little bit shouldn't affect the PSU's long-term reliability by much.

In our opinion, Riotoro is on the right track, and Great Wall is a good OEM. So we expect more from this company in the future. Two lower-capacity Onyx family members would help Riotoro cover a larger market segment and probably boost the Onyx line's sales. More efficient GPUs that don't need monster power supplies are popular right now. However you should pay attention to your system's energy needs. Under full load, the PC shouldn't apply a load close to the PSU's maximum power, but rather you want to see it around 70-80%. That way you won't over-stress the PSU, while still enjoying maximum efficiency.


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  • turkey3_scratch
    I don't think it's so much the aggressiveness of the fan that contributes to the noise rather than the fact that it's just a noisy fan. There are many other fans that could be spinning at equal RPM and be much quieter while providing the same amount of cooling.
    Then again, the noise should not be too severe of a deal in a computer case with other fans (such as case fans at 100% always) contributing more significantly to the net noise.

    Edit: Nevermind, dope move by me. I didn't realize the y axis started at 1400RPM, yep, that fan RPM is very high indeed.
    Reply
  • Ne0Wolf7
    20135612 said:
    I don't think it's so much the aggressiveness of the fan that contributes to the noise rather than the fact that it's just a noisy fan. There are many other fans that could be spinning at equal RPM and be much quieter while providing the same amount of cooling.

    Then again, the noise should not be too severe of a deal in a computer case with other fans (such as case fans at 100% always) contributing more significantly to the net noise.

    I agree, especially when you're like me and have six of them because you were obsessed with filling all of the fan slots on your first build (lol). When the noise finally got to me, I got creative with my intake/ output configuration, and set my PSU to ECO mode (which is no fan). The PSU started roasting, so I rebooted with the fan going and noticed no noise difference whatsoever and the PSU was much cooler (then again, my case fans are sleeve bearing, but still).
    Reply
  • turkey3_scratch
    20135670 said:
    20135612 said:
    I don't think it's so much the aggressiveness of the fan that contributes to the noise rather than the fact that it's just a noisy fan. There are many other fans that could be spinning at equal RPM and be much quieter while providing the same amount of cooling.

    Then again, the noise should not be too severe of a deal in a computer case with other fans (such as case fans at 100% always) contributing more significantly to the net noise.

    I agree, especially when you're like me and have six of them because you were obsessed with filling all of the fan slots on your first build (lol). When the noise finally got to me, I got creative with my intake/ output configuration, and set my PSU to ECO mode (which is no fan). The PSU started roasting, so I rebooted with the fan going and noticed no noise difference whatsoever and the PSU was much cooler (then again, my case fans are sleeve bearing, but still).

    I have a build with like 6 fans that gets noisy because the motherboard only supports so many fans, so I have to plug them into the PSU. But I also have a second build that is dead silent with some Noctuas, and that's the type of build I would want a very silent or at least semi-passive PSU in.
    Reply
  • Ne0Wolf7
    20135678 said:
    20135670 said:
    20135612 said:
    I don't think it's so much the aggressiveness of the fan that contributes to the noise rather than the fact that it's just a noisy fan. There are many other fans that could be spinning at equal RPM and be much quieter while providing the same amount of cooling.

    Then again, the noise should not be too severe of a deal in a computer case with other fans (such as case fans at 100% always) contributing more significantly to the net noise.

    I agree, especially when you're like me and have six of them because you were obsessed with filling all of the fan slots on your first build (lol). When the noise finally got to me, I got creative with my intake/ output configuration, and set my PSU to ECO mode (which is no fan). The PSU started roasting, so I rebooted with the fan going and noticed no noise difference whatsoever and the PSU was much cooler (then again, my case fans are sleeve bearing, but still).

    I have a build with like 6 fans that gets noisy because the motherboard only supports so many fans, so I have to plug them into the PSU. But I also have a second build that is dead silent with some Noctuas, and that's the type of build I would want a very silent or at least semi-passive PSU in.
    My ATX motherboard only has two fan headers, not sure who was in charge there, haha, but I bought two three way splitters so I could control the speeds. My side panel has two fan slots, and I can only use one of them because the CPU cooler, so I just have this lovely outlet for sound... Its really a blessing too beacsue I have two GPUs so one can never be tarved for air too much but still. A new case and fans are in my future somewhere.
    Reply
  • takeshi7
    Can you review the Rosewill Hive 750W? I got one on sale for $60 recently and there aren't any recent reviews for it, and not from any that are as in depth as Tom's Hardware.
    Reply
  • James Mason
    @takeshi7, there aren't new reviews for it because it isn't a new PSU.
    Reply
  • takeshi7
    20143641 said:
    @takeshi7, there aren't new reviews for it because it isn't a new PSU.
    It's still relevant though. Especially because it's cheaper, more powerful, and has the same 80 Plus rating as this Riotoro unit.
    Reply
  • turkey3_scratch
    20144799 said:
    20143641 said:
    @takeshi7, there aren't new reviews for it because it isn't a new PSU.
    It's still relevant though. Especially because it's cheaper, more powerful, and has the same 80 Plus rating as this Riotoro unit.

    "More powerful" can be interpreted many ways. What do you mean by that?
    Reply
  • takeshi7
    20144830 said:
    20144799 said:
    20143641 said:
    @takeshi7, there aren't new reviews for it because it isn't a new PSU.
    It's still relevant though. Especially because it's cheaper, more powerful, and has the same 80 Plus rating as this Riotoro unit.

    "More powerful" can be interpreted many ways. What do you mean by that?
    I mean 750W > 650W.
    Reply
  • turkey3_scratch
    20144901 said:
    20144830 said:
    20144799 said:
    20143641 said:
    @takeshi7, there aren't new reviews for it because it isn't a new PSU.
    It's still relevant though. Especially because it's cheaper, more powerful, and has the same 80 Plus rating as this Riotoro unit.

    "More powerful" can be interpreted many ways. What do you mean by that?
    I mean 750W > 650W.

    Eh, doesn't really mean much of anything if you ask me. It's just what they decided to rate it at. I don't think we'll ever see a Rosewill Hive review. They're older and newer units get reviewed instead.

    A high quality lower wattage power supply can be more powerful than a lesser quality higher wattage power supply.
    Reply