CoolerMaster Real Power Pro 750 watt Power Supply

Makaveli - 2007-05-29 00:52:58 in Power Supplies
Category: Power Supplies
Reviewed by: Makaveli   
Reviewed on: June 5, 2007
Price: $169.99


SLi, Crossfire, 750GB hard drives, quad-core processors. These are just a few of the power-hungry technologies and products which need to be fed the watts. Do you really need to go all out and get a 1000watt power supply that is going to make your electric bill go through the roof? How about a power supply that isn’t too big, but can easily handle the applications listed above?

Think of a number between 500 and 1000. I thought of 750. Coincidently, the power supply that I’m reviewing today is the Cooler Master Real Power Pro 750watt power supply. I’m going to rip this power supply up with a bunch of rigorous tests to see if it can handle what I do, but also to see its potential.

Cooler Master is one of the most well known companies in the computer hardware industry thanks to its line of superior cases. Will this power supply help Cooler Master’s success in the power supply market? Let’s dig in to find out all about this 750watt power supply.

Closer Look:

The retail box for the power supply was bulging. This either meant too much stuff or too much padding; let’s hope it’s the latter. The image on the front of the box is very simple and professional looking and it certainly catches the eye. The top of the box has a handle for easy transportation, as well as icons displaying some of the features of the power supply. The back of the box displays the specifications of the power supply, as well as a picture of the plugs and how many of each is included with the power supply. The sides of the box just have some information about the product, such as what type of power supply it is, whether it is a US type, Euro type, UK type and so on.



When you open the flap in the front, you’ll see a huge manual resting on top of the power supply. The bigger the manual is, the more information it holds - which is always a plus. The cables are folded neatly and rest on the left side of the box; they look almost like a coiled up snake.


Once you take everything out of the box, you’ll see what’s included. With the power supply you get a huge manual, mounting screws, and a power cable.

Each side of the power supply displays the specifications, telling you how many amps for each rail, what the maximum power is, the maximum AC input and so forth.

Closer Look:

At the bottom of the power supply, you can see a 120mm fan. We’ll get a closer look at that, once we open up the power supply.


The back of the power supply has mesh-style ventilation.  The power switch and port for the power cable are also located in the back.

For reviewing purposes, I opened up the power supply. I wouldn’t suggest this unless you absolutely have to, because as soon as the seal on one of the screws is broken, the warranty is void. But here it is: the inside with all the capacitors and heatsinks.


Below you can see the 120mm fan made by SUPERRED.

Now let’s take a closer look at the cables included.  There is one 24-pin power cable and one 4-pin +12v CPU connector.

Two 8-pin PCI-Express connectors and two 6-pin PCI-Express connectors.  These are spread out over two cables like the one shown below; the top connector is the 8-pin and the bottom is the 6-pin.

There are five 4-pin peripheral molex connectors; 3 on one rail and 2 on the other. One 8-pin +12v CPU connector.

The power supply has six SATA connectors. Lastly, there is one 4-pin Berg connector (floppy drive connector).



To install the power supply, you must first remove the power supply that is currently in your computer. Depending on your case, you will either have to slide the power supply in from the back, or open the side and put the power supply in that way. For me, I had to slide it in. Once your power supply is in, start by connecting all of the required connectors. After that, plug in the power supply, flip the switch to 'on' and press the power button on your case.



Model RS-750-ACAA-A1
Type ATX Form Factor 12V V2.2 / SSI standard EPS 12V V2.91
PFC Active PFC (0.99)
Input Voltage 90 ~ 264V (Auto Range)
Input Current 12A @ 115Vac / 6.3A @ 230Vac
Input Frequency Range 47~ 63Hz
Fan 120mm fan with intelligent speed controller
Power Good Signal 100 ~ 500ms
Hold Up Time >17 ms
Efficiency (Load) >80% Typically
MTBF >100,000 hrs
Output Capacity 750 Watts Continuous
Max. Output Capacity 900 Watts
Protection OVP / UVP / OTP / OCP / OLP / OPP / SCP
Dimension 150 x 150 x 86 (mm)
Operation Temperature 0 ~ 40C (Nominal Input Voltage)
Safety Nemko / TUV / cUL / CE / BSMI / FCC / CCC

Model 115/230Vac 12/6.3A 60/50Hz
Load +3.3V +5V +12V1 +12V2 +12V3 -12V +5Vsb
Max. Load 25A 25A 19A 19A 19A 0.8A 3.5A
Max. Power 191W 648W 9.6W 17.5W


In order to test this power supply, I pulled out my RadioShack 29-Range Digital Multimeter so that I could check the voltages of the rails at idle and under load. To load up the system, I'm running OCCT for the CPU (to make sure both cores are fully loaded), 3DMark06 for loading the video card and HDTach to load the hard drives. I’m comparing the Cooler Master Real Power Pro 750watt power supply against my XG 600watt power supply to see how the 12 volt, 5.0 volt and 3.3 volt lines measure up to one another. In any test, you don’t want to see a drop in voltages. Instead, you want to see the voltages stay as close as possible to the stated values of 12.0v, 5.0v, and 3.3v.

Test System:

Testing Tools:



After I tested both units, I couldn’t believe just how much my old XG 600watt power supply fluctuated. The CoolerMaster stayed right on track and didn’t differ from what it said the voltages should be. Clearly, the CoolerMaster Real Power Pro 750watt power supply was the winner in this battle.



You can see from the tests that this power supply was consistently stable - a much desired attribute in a power supply. The voltages didn't fluctuate much, no matter what I did to try to stump this power supply. I like the physical size of the power supply because it’s only six inches long, and this thing sure has more power than I could ever ask for. My old power supply was so big that in my old case, I had to remove my chimney fan that blew the air upwards, which made my temperatures rise significantly. But with this power supply, that's not a worry for me. As far as cable length goes, I felt that they were a good length. I have them rigged to stretch almost all the way on the other side of my full-tower case and still have some slack. The black mesh netting over the cables looks very slick and keeps everything organized. A three year warranty on a product is always a good thing for the consumer because it ensures the user that if something does go wrong, they're covered. The bottom line is that this power supply performs as advertised and doesn’t fluctuate much at all, all while not taking up much space in your case.