Reviews - Cooler Master Silent Pro Gold 1200W
Sample Provided by: Cooler Master (By OklahomaWolf on Mon, Jul-26-2010)

Page 1 -

We've been looking at a lot of 80 Plus Gold units lately, haven't we? Today, Cooler Master's getting in on the action with the new Silent Pro Gold series, a line of units that starts at 600 watts and goes all the way up to 1200 watts. I'm going after the big one today, the 1200W model, which is only the second Gold unit this size I've tested. You will recall that the first was the incredible Corsair AX1200 unit. It will be interesting to see how this unit stacks up against that one.

But first, you guessed it, we're looking at some box pictures. But not too many, for this box doesn't have a lot to look at.

I'll just jump right to the back of the box here. On the left, there is a set of specifications and a simple load table of this unit. There is a table of connectors mixed in there too, which includes a rare "floopy" connector. Let me tell you folks, I don't know what a floopy is, but I'm glad this unit can power one.

On the right side of this picture, there are a few fancy diagrams. One shows the fan curve, while the other shows the efficiency curve. That second one seems to imply that this unit will only barely do Gold at 115 volts AC. We'll have to see about that on the next couple of pages.

Meantime, let's glue our eyes to the center of the picture, where the box has some marketing to talk about. I'll just present all this in bullet form for you now:

  • HTT
    HTTâ„¢ is a patented technology that uses a unique "L-shaped" heat-sink and superb ventilation to remove heat waves from the power supply.
    -uh... ok... I'm not sure I follow, here. The picture next to the blurb shows the heatsinks, but I don't see anything especially unique about them. Enhance, the OEM for this unit, uses them in countless designs. Both for Cooler Master and for other companies. And I've seen similar heatsink designs from Andyson and Sirfa as well, to name but a couple.
    The IC direct connects with the transformers that reduces switching and energy loss, ultimately leading to huge efficiency ratings.
    -well, now... the picture next to this little blurb is something I haven't seen before in a power supply. I can't wait for disassembly to see what it really looks like inside.
    A revolutionary heat transfer design that combines a heat-sink with the transformer. With the transformer size reduced by 25%, efficiency is stretched to the max.
    -ah, so that's what those sticky-outie metal pieces are we see in that middle picture. They attach the transformer to the heatsink. I'm not sure I've seen this done before, and it could have an impact on efficiency.

This is the only remaining side of the box with anything resembling interesting info on it. And all it says is that you should visit the Cooler Master website for more info. In several languages.

Opening the box, we find the power supply nestled in a cushion of foam. I'll just unpack this here, and we can start looking at the unit proper.

Here's the stuff I found in the box, without the actual gold bars I wish I'd found in the box instead. A power supply, a bag of modular cables, a power cord, a bag of screws, and a cardboard sleeve that contained the following:

A brief user guide and a business card.

I must admit, I rather like the finish on this unit. It's matte black and seems to be quite rugged. It also seems to be smudged up by the fan grille or something, and not by my own doing.

The labels around the modular cables are done up in much the same way I found with the Seasonic X750 from last time. The color isn't bad, but hard to see in dim light. Fortunately, these modular cable connectors are colored in something other than black - it's easy to tell what goes where without reading labels.

Here's the exhaust grille. Not as open as some, but this should be adequate for good cooling.

This is what the unit looks like from the side. If you have a windowed case, this is what you'll see with the unit installed.

And here we have the fan grille, a pretty standard wire affair colored in, what else, gold.

Here's the label of the day. As you can see, this unit boasts a whopping 98A single 12V rail. I've said it before and I'll say it again... single 12V rails of this size make me nervous. Should something not fail in a direct short, it's conceivable that the overcurrent protection trip point will be high enough to keep the unit from shutting down. This isn't really a big deal, but once again I will reiterate that multiple 12V designs aren't evil. The devil will not come up and jam a pitchfork through your new video card if you dare to buy a well designed multi rail unit.

Most of these big bad units do have the facility for multi-rail overcurrent protection, it's just disabled. Some units let you switch it on and off. This switch isn't a hard thing to implement. I'd like to see more such switches.

Cooler Master Silent
Pro Gold 1200W

+3.3V +5V +12V -12V +5VSB
22A 25A


0.3A 3.5A
Max Power 150W 1176W 3.6W 17.5W

Here's the modular connector panel from a bit closer up. Cooler Master thoughtfully indicated right on the label which pins carry which voltage, which pleases me.

This unit does have some hardwired cables, which I've pictured above. These are only semi-sleeved in the case of the PCI-E cables. I'm not sure how I feel about this. On one hand, I normally don't like to see manufacturers do a half baked job here. On the other hand, the yellow wires do kind of match with the overall color scheme, and bare wire is easier to manage than sleeved wire when lengths are this short. I don't know how to feel - I'm confused. You've confused me, Cooler Master. Now I'm going to have to spend the rest of this review mistaking my flashlight for my water glass, because they're right next to each other. All I know is, one's yellow and one's black.

Here are the modular cables, all done with ribbon cable. The peripheral cables seem to be fairly thin gauge to me. This won't be a problem as long as you're using them for hard drives, but I wouldn't use any Molex to PCI-E adaptors with these wires. Particularly since the unit only has the four Molexes, one of which has that floopy connector on it.

Get this - that floopy connector? It looks just like a 3.5" floppy connector. I bet they can be used interchangeably. Haha... I'm smrt.

Type of connector: Cooler Master Silent
Pro Gold 1200W
ATX connector (500mm) 20+4 pin
4+4 pin ATX12V/EPS12V (600mm) 2
6+2 pin PCIe (610mm) 2
6 pin PCIe (+90mm) 2
Modular Cables
6+2 pin PCIe (600mm) 2
6 pin PCIe (+100mm) 2
SATA (500mm+100mm+100mm) 9
5.25" Drive (450mm+95mm) 4
3.5" Drive (+100mm) 1
Unit Dimensions(L x W x H)
180mm x 150mm x 85mm


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