Cooler Master MasterWatt Maker 1200 MIJ 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 MasterWatt Maker 1200 MIJ's rails. The limits, according to the ATX specification, are 120mV (+12V) and 50mV (5V, 3.3V and 5VSB).

Swipe to scroll horizontally
Test 12V 5V 3.3V 5VSB Pass/Fail
10% Load 17.4mV 8.9mV 9.8mV 5.2mV Pass
20% Load 15.4mV 9.5mV 10.0mV 5.5mV Pass
30% Load 17.4mV 9.2mV 9.7mV 6.1mV Pass
40% Load 17.5mV 10.3mV 9.3mV 6.5mV Pass
50% Load 22.5mV 12.4mV 14.7mV 10.4mV Pass
60% Load 18.5mV 10.5mV 9.9mV 9.3mV Pass
70% Load 23.3mV 12.5mV 11.5mV 10.1mV Pass
80% Load 23.0mV 13.0mV 11.8mV 11.4mV Pass
90% Load 25.5mV 13.5mV 12.3mV 13.1mV Pass
100% Load 30.5mV 15.9mV 14.6mV 16.7mV Pass
110% Load 34.6mV 17.5mV 16.1mV 18.3mV Pass
Cross-Load 1 22.9mV 11.5mV 11.3mV 9.3mV Pass
Cross-Load 2 30.9mV 13.3mV 15.3mV 15.2mV Pass

Ripple suppression is great on the minor rails and 5VSB, and satisfactory at +12V. We don't see Super Flower- or Seasonic-class ripple suppression on the most important (+12V) rail. However, 30.5mV under full load and high ambient temperatures still represents good performance.

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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


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Aris Mpitziopoulos
Aris Mpitziopoulos
Contributing Editor

Aris Mpitziopoulos is a contributing editor at Tom's Hardware, covering PSUs.

29 Comments Comment from the forums
  • Dark Lord of Tech
    Can you say not worth it ? Not even close.
    Reply
  • SoFlaWill
    Quit reading at the price tag. Can I have some of what you're on?
    Reply
  • dstarr3
    A THOUSAND DOLLARS?! What on Earth would a desktop PSU have to do to be worth $1,000? Clearly nothing that this PSU in particular is doing.
    Reply
  • dstarr3
    Like, seriously, you could build an entire gaming PC with a different 10-year-warranty PSU for the cost of this one PSU. Simply MUST be targeting the more-money-than-sense crowd here.
    Reply
  • jcwbnimble
    What was CM thinking with this product? Are there really people out there that would drop $1K on a power supply that was inferior to units that cost half as much? This sounds like a product that CM agreed to just to get Murata in bed with them for future projects.

    Murata to CM "Sure we'll start making products for you, just agree to buy our first effort regardless of price point, quality, and technological compromises".

    I'm now waiting for the CM case made by Gucci that uses external laptop power supplies, has room for only one 7mm SSD, and can't even accommodate a 7" GPU. I'd pay $1k for it as long as everyone knows it's made by Gucci.
    Reply
  • jcwbnimble
    Oh, and I forgot to mention that it comes with ribbon cables. How did CM "spare no expense" when it includes basic black ribbon cables? Come on guys, you should have blasted this PSU the second you opened the box and saw ribbon cables on a $1000 power supply.

    AND this thing is huge. Seriously CM?!!! The PSU on my original IBM PC/AT wasn't this large, and that had capacitors the size of D batteries in it.

    Total fail by Murata and even bigger fail by CM for putting their name on it.
    Reply
  • dstarr3
    lol Someone in the comments is actually trying to defend this product with downvotes. I'm sorry, but at this pricepoint, this product is indefensible.
    Reply
  • drwho1
    Like everyone is saying, NO Thank You, anyone can build an entire system for $1000 or less WITH a powerful/trusted PSU included.
    Reply
  • InvalidError
    19609320 said:
    Oh, and I forgot to mention that it comes with ribbon cables. How did CM "spare no expense" when it includes basic black ribbon cables?
    What is the problem with "basic black ribbon cables"? Personally, those are my favorite. I much prefer that over individual loose wires and braiding that snags on every somewhat sharp corner, screw and anything else that might stick out a bit.

    @Arris: the "some other way" to rectify AC without a bridge is bridge-less APFC where the boost diodes and the APFC FETs effectively replace the input bridge.
    Reply
  • TheFuzzz
    the box and packaging are nice. $1,000.... It should have a lifetime warranty
    Reply