Cooler Master MasterWatt Maker 1200 MIJ PSU Review

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Final Analysis

A PSU that is designed and built in Japan surely attracts lots of attention. In this case, a $1000 price tag is also noteworthy. We expected no less than perfection from it, but were let down in several different areas.

Cooler Master's build quality is definitely top-notch. However, this doesn't seem to be enough since the performance levels our equipment measured don't match less expensive competitors. Murata isn't new to PSU manufacturing, but its engineers don't have any experience working with desktop power supplies. Apparently, Cooler Master's engineers weren't able to guide them properly. As a result, we end up with uninspiring results and dubious value.

We were really disappointed to see such a PSU failing in our transient response tests on the 3.3V rail. Forty Murata engineers worked for countless hours on this platform and none of them caught the problem we found?

Cooler Master dared to offer something extreme, suitable for enthusiasts flush with cash. The cooperation with Murata, one of the largest manufacturers of electronic parts, adds a new chapter to the desktop PSU segment. But if Murata wants to establish a name for itself, it needs to work on lower-priced products. There is no argument that a "Made in Japan" label attracts power users who recognize quality hardware. Most won't take a second look when they see the cost, though.

The right price for Cooler Master's MasterWatt Maker 1200 MIJ, would probably be between $400 and $500. The current price simply kills any comparison we make to other high-quality Titanium-class PSUs. For $1000, you could get two superior AX1500is and still have money leftover.

To be fair, the build quality of this MasterWatt Maker 1200 MIJ is among the best we've ever seen, and the platform's design is innovative, despite the lack of digital parts for controlling its main functions. Other advantages include silent operation, high efficiency, decent ripple suppression, and an accurate power-good signal.

On the other hand, besides a huge price tag, the 3.3V rail's bad transient response and oversized physical dimensions have to be considered cons. We were shocked to see such large voltage drops at 3.3V during the transient tests, and although this rail is only lightly used nowadays, it should still perform well, especially in ultra-high-end PSUs.

If you relish exclusivity, and a $1000 price tag doesn't scare your wallet, then put the MasterWatt Maker 1200 MIJ on your shopping list and brag to your friends about dropping a grand on the priciest desktop PSU available. The truth, however, is that you can spend half as much and get a better power supply. We would gladly pay a premium if Cooler Master had given us a fully digital platform that outperformed everything else. But that just wasn't the case.

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Contributing Editor

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

  • Dark Lord of Tech
    Can you say not worth it ? Not even close.
  • SoFlaWill
    Quit reading at the price tag. Can I have some of what you're on?
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • drwho1
    Like everyone is saying, NO Thank You, anyone can build an entire system for $1000 or less WITH a powerful/trusted PSU included.
  • 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.
  • TheFuzzz
    the box and packaging are nice. $1,000.... It should have a lifetime warranty