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Load Regulation, Hold-Up Time & Inrush Current
To learn more about our PSU tests and methodology, please check out How We Test Power Supply Units.
Primary Rails And 5VSB Load Regulation
Load Regulation testing is detailed here.
Our hold-up time tests are described in detail here.
The hold-up time we measured is pretty long, and the power-good signal is accurate.
For details on our inrush current testing, please click here.
The inrush current is very low. That large NTC thermistor does an excellent job.
Load Regulation And Efficiency Measurements
The first set of tests reveals the stability of the voltage rails and the MasterWatt Maker 1200 MIJ's efficiency. The applied load equals (approximately) 10 to 110 percent of the PSU's maximum load in increments of 10 percentage points.
We conducted two additional tests. During the first, we stressed the two minor rails (5V and 3.3V) with a high load, while the load at +12V was only 0.1A. This test reveals whether a PSU supports Intel's C6/C7 power states or not. In the second test, we determined the maximum load the +12V rail could handle with minimal load on the minor rails.
Load regulation is quite good at +12V, next to perfect at +5V, and satisfactory at 5VSB. The 3.3V rail performs the worst, although it's still close to 2%. Then again, we aren't talking about your average power supply. This is an incredibly expensive one, so we're not going to be satisfied with anything short of exceptional.
The MasterWatt Maker 1200 MIJ's efficiency is very high; it has no problem delivering full power under high ambient temperatures. Moreover, the fan spins fairly slowly, keeping noise output low as well.
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Aris Mpitziopoulos is a Contributing Editor at Tom's Hardware US, covering PSUs.
Can you say not worth it ? Not even close.Reply
Quit reading at the price tag. Can I have some of what you're on?Reply
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
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
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.Reply
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.
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.Reply
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.
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
Like everyone is saying, NO Thank You, anyone can build an entire system for $1000 or less WITH a powerful/trusted PSU included.Reply
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.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?
@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.
the box and packaging are nice. $1,000.... It should have a lifetime warrantyReply