Rosewill Tokamak 1500 PSU Review

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Ripple Measurements

To learn how we measure ripple, please click here.

The following table includes the ripple levels we measured on the Tokamak 1500's rails. The limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V and 5VSB).

Swipe to scroll horizontally
10% Load37.1mV14.9mV8.7mV7.6mVPass
20% Load33.3mV20.0mV13.9mV11.9mVPass
30% Load37.9mV21.3mV13.2mV12.4mVPass
40% Load41.7mV21.1mV14.1mV12.8mVPass
50% Load48.0mV22.2mV12.7mV15.4mVPass
60% Load68.7mV39.5mV29.7mV24.5mVPass
70% Load77.3mV32.0mV22.8mV23.9mVPass
80% Load83.8mV30.7mV22.9mV22.9mVPass
90% Load90.3mV30.4mV21.5mV23.4mVPass
100% Load94.7mV29.4mV22.7mV24.0mVPass
110% Load100.6mV28.5mV22.3mV25.2mVPass
Cross-Load 148.3mV15.3mV10.4mV7.9mVPass
Cross-Load 292.8mV29.3mV19.5mV23.6mVPass

Ripple on the +12V rail is terrible. We didn't expect such lousy results from an ultra-high-end PSU like this one. It looks like Enhance focused on efficiency and load regulation at the expense of ripple suppression.

Our results on the other rails aren't as bad, though they're still not able to match the competition.

Ripple Oscilloscope Screenshots

The following oscilloscope screenshots illustrate the AC ripple and noise registered on the main rails (+12V, 5V, 3.3V and 5VSB). The bigger the fluctuations on the screen, the bigger the ripple/noise. We set 0.01 V/Div (each vertical division/box equals 0.01V) as the standard for all measurements.

Ripple At Full Load

Ripple At 110-Percent Load

Ripple At Cross-Load 1

Ripple At Cross-Load 2

Contributing Editor

Aris Mpitziopoulos is a Contributing Editor at Tom's Hardware US, covering PSUs.

  • Onus
    With GPU-based mining days long gone, I don't ever see myself in the market for a beast like this; but no power switch? That's...bizarre.
  • Brian_R170
    I keep reading that muti-GPU systems are on the decline, so what's continuing to drive development of PSUs with >1KW output?
  • leclod
    Same here...
  • kittle
    18972155 said:
    I keep reading that muti-GPU systems are on the decline, so what's continuing to drive development of PSUs with >1KW output?
    Im curious too -- i can only speculate the marketing folks are still pushing the "bigger number == better" mantra
  • JohnnyLucky
    There are still some hardcore enthusiasts and a few who want bragging rights. I couldn't help but notice quite a few cons.
  • captaincharisma
    there is always someone out there whether they are an enthusiast or a first time system builder that will blindly buy this because after all "bigger is better" lol
  • turkey3_scratch
    Rosewill always goes with a very simple exterior. I like it. This is also a very unique name. I'm sick of boring PSU names. Tomakamek. Sounds like some sort of ancient island, I like it.
  • SkyBill40
    The reactor of the same name was the first thing that came to mind upon seeing it and even before it was mentioned in the write up. An interesting choice, no doubt. Given the output, I guess it's somewhat fitting.
  • daglesj
    Must admit rarely use the power switch at the back. Quicker to know that a pulled power lead means 'off'...completely. No great loss.
  • lunyone
    So ready for this to be in a m-ITX build! Lol! Too bad it isn't modular! <sarcasm over>