Cooler Master Real Power Pro 850W Review

gotdamojo06 - 2008-04-01 14:32:53 in Power Supplies
Category: Power Supplies
Reviewed by: gotdamojo06   
Reviewed on: April 17, 2008
Price: $199.99


With the release of all the new processors from Intel and the release of power hungry video cards, you may be wondering what you need to do to keep enough power going to your computer. You may not have two or more video cards inside of your case, but even if you think a little further down the road that you might want to, then you should get a power supply that is going to be able to power all of your components and your processor. Yet with so many choices, which is the best? This is where Cooler Master comes in, with their Real Power Pro 850W power supply, which is said to be able to power a Quad-SLI setup. This should more than protect you from any upgrades you may add to your computer. Let's take a look at this piece of hardware and see what makes it so special and stand out from the others.  

Closer Look:  

Taking a look at the packaging that the Cooler Master Real Power Pro 850W comes in, you are able to see that the power supply does have enough connectors to support an SLI setup, which can be a big selling point for some purchasers. Also, by taking a look at the front of the package, you are able to see that the power supply not only comes with 850W of power, but a five year warranty to back it up, which is another big selling point for some system builders. There is not a lot of information on the two sides of the package, other than that the power supply is English type and that if you wish for more information, to consult their website. However, the back of the box is packed with information. When you look, all of the specifications are listed out in a neat table and there are a few key features that are important for you to read if you are interested in the power supply.















When you open up the package, you are able to see that Cooler Master packed this product very nicely using molded foam to keep the product in its place and protected from any type of damage during the shipping process. Not only is the cooler Master Real Power Pro 850W power supply protected by the foam, it is also wrapped in a plastic cover to keep from getting scratches on it during the shipping process. Everything is divided up into its own little section of the package, which makes it neat and organized. With the Real Power Pro 850W, you also get a power cord to power the device, as well as an instruction book, a case badge and a bottle opener for your key chain, which could come in handy for the installation of this piece of hardware.  



Let's keep looking at the Cooler Master Real Power Pro 850W power supply and see what it looks like up close and personal.  


Closer Look:  

When you get the Cooler Master Real Power Pro 850W power supply out of the plastic wrap, you are able to see how beautiful the power supply is, with its mirror-like finish on the chassis. Cooler Master decided to put a 135mm fan on the side, to suck in fresh air from inside of the case to cool the components inside of the power supply. Once the air is inside of the power supply, it is able to freely move around cooling the parts inside, then freely flow out the back of the power supply, where there is a wire mesh type material by the power cord input. From this side, you are also able to see inside of the power supply and get a glimpse of what the inside looks like. On the other side, you are able to see the mirror-like finish that was put on the power supply by Cooler Master, which unfortunately attracts finger prints very easily as you can see. There are a bunch of cords that come with the power supply, that are wrapped in a very nice black loom to keep the wires a bit more organized. One thing I noticed on the rear of the power supply, was the lack of an on/off switch. There are several reasons for this listed on their website, but the main reason is making sure that the power supply is not damaged by transient in-rush current of up to 150 amps (worst case Scenario) that can melt the reed on the inside of the switch. Better safe than sorry.


















Now we will take a look at the different Molex connectors that are attached to the power supply. There is the standard 24 pin motherboard connector, as well as the standard 4pin connectors, along with the SATA connectors. There are also some 4pin, 6pin, 8pin and 8pin + 12V connectors. The Real Power Pro 850W power supply has plenty of connectors to power your computer and even a few left over, which is always nice.  



You should never open up your power supply for a few reasons, one being the risk of an electrical shock that you may get if you do not know what you are doing in there and the other being that your warranty will be voided. For these reasons, this is why I will be opening it up, so that you will not have to and you still know what the inside looks like. As soon as you open it up, you can tell that this power supply was built with a view to keeping temperatures down, as it has two large heatsinks covering the major parts that will heat up very quickly.  



When you take a look at the two large capacitors, you are able to read the specifications of them on the side, which mean that the capacitors are rated for 450 volts a piece. You can then look up the information for these capacitors and find out that they are rated from -55 C to +105 C.  


The fan that is installed in the power supply is manufactured by the Young Lin Tech Company and is a 12V DC fan.  


Now that we know what the power supply looks like, we should take a look at what all of the specifications are as well as the features of the Real Power Pro 850W power supply.  



Model                 RS-850-EMBA
Type ATX Form Factor 12V V2.3 / SSI standard EPS 12V V2.91
Dimension (W / H / D) 150(W) x 180(L) x 86(H) (mm)
Input Voltage 90~264V (Auto Range)
Input Current 12A@ 115 Vac / 6.3A@ 230 Vac
Input Frequency Range                 47~63 Hz
PFC Active PFC(0.99)
Power Good Signal                 100~500 ms
Hold Up Time >17 ms

                81%(170W) / 85%(425W) / 82%(850W)

MTBF >100,000 hrs
Protection OVP / OCP / OTP / OLP / Short / Full Protection
Output Capacity 850 Watts Continuous
Max. Output Capacity                 1,000 Watts
Operation Temperature 0~50(Nominal Input Voltage)
Safety CE / cUL / TUV / NEMKO / BSMI / FCC / CCC / C-tick / GOST
Fan Ultra-silent 13.5mm fan with intelligent speed control
Certification nVIDIA SLI / 80 Plus
Connector M/B 24 Pin Connector x 1
CPU 4 Pin x 1
CPU 8 Pin x 1
PCI-E 8 Pin x2
PCI-E 6 Pin x 4
4 Pin Peripheral x 6
SATA x 8
4 Pin Floppy x 2


115/230       12A/6.5A        60Hz/ 50Hz
+3.3V +5V +12V +12V +12V +12V +12V +12V -12V +5Vsb
Peak Current
25A 30A 18A 18A 28A 28A 18A 18A 0.8A 3.5A
Total Output
191W 768W 9.6W 17.5W
850W (Continuous)




 All information sourced from coolermasters specification page at


To properly test the Cooler Master Real Power Pro 850W power supply, I will be using a digital multimeter to gather readings of the different rails of the power supplies. I will be doing this under two conditions. The first will be idle testing, measured after the computer has been started up and sitting for about a half hour doing nothing. The second condition I will be measured while the computer is performing different tasks back-to-back, such as an OCCT 30 minute stress test, as well as 3DMark06.

Testing Setup:














The Cooler Master Real Power Pro 850W power supply did very well compared to the other power supplies that it was compared to. All of the rails of the Real Power Pro were more stable and closer to the rating that they are rated for when put up against the other power supplies.  


The Cooler Master Real Power Pro 850W power supply is a great looking piece of hardware that your computer setup will love, as long as you do not mind the extra wires piled up in your case. The Real Power Pro did exactly what it was supposed to do - deliver power to my computer and keeping all of the rails very stable and close to their stated ratings. There was little fluctuation in the voltages between the idle and load testing. Watching the voltages while running through 3Dmark06, it seemed to handle the load, to no load and back to load changes with little change in the voltages measured. The only complaint that I have, is the way that Cooler Master designed this power supply - they should have made it with a modular design, to keep the amount of wires hanging around the inside of the computer to a minimum. Either that, or made the wires shorter, which will make it easier to hide the wires in your case. If you are fine with having to manage the extra wires that are not used, a non-modular power supply will fit the bill for your build. When looking on the Nvidia website, I was unable to find this power supply listed as Quad SLI certified, which seems very strange considering the features list, so until it is on there, I can not suggest getting this power supply for powering a Quad SLI setup based on the lack of Quad SLI certification. On the other hand, it is listed as an SLI certified power supply capable of powering up to two 8800GTX 768MB video cards in SLI. This certification process is in place to provide the best possible user experience. The cooling capabilities of this power supply are great, as it has a huge heatsink on the inside covering all the internal components. The blend of a great performing power supply, with great looks, makes it a winner in my book. I would suggest picking it up if you are looking for a new power supply that will be able to power just about anything you need to throw at it.