Cooler Master Real Power Pro M700 700w Modular PSU

Test Results

Load Testing

To provide our readers with the most accurate results, Overclock3D uses a custom built PSU load tester on all reviews. This not only gives much more reliable results than the testing methods employed by other sites, but also allows for all current and future review results to be compared side-by-side.
   0%  50%  100%
 +3.3v Rail  0w  33w  66w
 +5.0v Rail  0w  50w  150w
 +12v Rail(s)  0w  300w  500w
 Total  0w  383w  716w
Cooler Master Real Power Pro M700 - Load Tests
At 0% load, all rails on the M700 sat fairly close to their ideal voltages with minimal amounts of "over-volting". This trend continued when we applied a load of roughly 50% (383w), with each of the six rails only showing a slight voltage fluctuation of  0.02v - 0.05v. Moving up to a full load of 716w (16w above the continuous output rating for this unit), the M700 still managed good voltage regulation with the highest drop in output being exhibited on the +12v rails which all dipped to around 11.94v.
Efficiency Results
Efficiency tests are performed by measuring the wattage consumed by the power supply at the mains (Mains Draw) against the power consumed by the OC3D power supply stress tester (PSU Load). These results may not be 100% accurate, but have proven to be extremely close to results obtained from professional equipment.
Cooler Master Real Power Pro M700 - Efficiency
At 50% load (383w) things were looking extremely promising for the M700, with efficiency being calculated at around 86%. However, as the load on the unit was increased all the way up to 716w efficiency took quite a steep downwards curve all the way down to 81%.
To be fair, the large majority of users will probably be placing the unit under a 300-500w load and thus will get a good level of efficiency from the M700, however it would have been nice to see the unit hold around 84-85% efficiency at full load.
Temperature vs Noise Output
As with all components in the modern computer system, the performance of a PSU can be directly affected by heat. Excess heat inside the PSU can easily have a negative effect of the maximum power output of the unit and lead to voltage instability. For this reason, Overclock3D includes temperature recordings taken from the PSU's exhaust using a thermal probe to highlight any potential issues that the PSU might have obtaining its rated output.

While keeping the temperature of a PSU under control is often just a case of increasing the speed of a fan, this can have a negative impact on noise levels. Therefore, Overclock3D also records the dBA output of the PSU (from a distance of 30cm) in order to gauge it's suitability for use in a silent environment.
Cooler Master Real Power Pro M700 - Temperature vs Noise
At both 0% and 50% loads there was very little audible change in PSU noise levels with our dBA meter only registering a 1dBA increase. Moving up to 100% load caused the 120mm fan in the M700 to speed up, resulting in a 4dBA rise in noise levels. While these results are certainly a lot higher than the 16dBA quoted by Cooler Master, the unit was still reasonably quiet when placed in a PC case with system, CPU and GPU fans running.
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Most Recent Comments

16-04-2008, 09:55:07

CoolerMaster are good @ delivering good service and man am I impressed with my CoolerMaster M1000 although I don't really need all that powerQuote

16-04-2008, 10:34:21

i have this psu, im very very impressed by it, tis great, one of best purchases ive made for my systemQuote

16-04-2008, 11:33:23

just another reason for ultra to sue

but yea, good review

always a nice readQuote

16-04-2008, 12:25:25

Yeah nice review Jim... I'm hoping to get my hands on one of these sometime soon. Should be good.


16-04-2008, 14:36:43

Mr. Smith
Looks bad to me.

Volts on the rails dropped considerably @ 716w load... What if someone actually tried 1000w?

Cheap though...Quote

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