PC Power & Cooling Silencer Mk III 600W (Page 4 of 4) | Reports

Page 4 - Minor Tests and Conclusion

Power supplies are interesting products -- because often, reviews of products in this category are conducted and tested in methods that make it difficult to distinguish one power supply from another. Many aspects have to be taken into consideration -- of which certain criteria consists of efficiency, noise, power ripples, and of course the ability to pull out the rated specifications. Because many cannot afford such equipment to obtain results regarding those aspects, articles covering power supplies often come out with less than adequate and acceptable information. As this is a product report -- not a review -- what we are doing is a close examination of the power supply, and the internal hardware and build. But what we can do for you is do some minor testing with the results we can present to you with, and let other review sites with professional equipment show you the actual test results. We're not going to try to BS you by installing the power supply into the latest gaming rig and try to take readings from that, as this is not even remotely the correct way to test power supply units. We understand that many websites do that as a means of load testing, but the results, even if you use an oscilloscope and multimeter at each output location, it is not sufficient, nor does it accurately reflect the performance of the power supply.


Using our power supply tester which exerts minimal load on the power supply, the initial consumption was 5W. Measured using our wall meter, this basic load-free power consumption of the PC Power & Cooling Silencer Mk III 600W is one of the lowest we have seen at the APH Networks labs. This is also one of the lower wattage units we have, so this is not a super surprising result. For your reference, the OCZ ZT Series 650W and Thermaltake Litepower 450W had initial consumptions of 5W and 7W, respectively. The Silencer Mk III 600W is a 80+ Bronze certified power supply, and it is reported from our affiliates with professional load testing equipment that the power supply lives up to its 80+ Bronze certification with ease. It also delivered generally good voltage regulation and ripple across the board, right up to its rated wattage.

Voltages with minimal load are generally accurate, which is a basic requirement of power supplies out of the box. The PG (Power Good) delay seems to be pretty decent; well within its rated range and general power supply standard of 293ms.

Active power correction is important to correct AC load line loss. In AC power, there are three components to it; as there is a phase difference between current and voltage. This makes up the power triangle, which consists of the following: Average usable power (P, measured in watts), reactive power (Q, denoted as VA-R), and total power (S, written as VA). While they all have the save physical units, it is not the same thing as aforementioned. What we want is the average usable power -- with as little wasted reactive power as possible. The total power provided over the AC line is the magnitude of the two combined (sqrt(P^2+Q^2)). Power factor can then be easily calculated by P/S. The ideal value is 1.00, and this is where active PFC comes in. Under nominal loads, the power factor value quickly jumped to 0.99, and consistently stayed at that point, indicating that the active PFC function is working very well.

As its name suggests, the PC Power & Cooling Silencer Mk III 600W couldn't be any more silent during normal operation. On a scale from 0-10, where 0 is silent and 10 is the loudest, I would rate the Silencer Mk III 600W at 1.5/10 acoustically under nominal loads. The power supply gets little turbulence noise when the fan speeds up, but under normal conditions, you would only hear noise when you stick your ear next to its fan. Of course, it is going to be loud under full loads, but for most people, you are not very likely to reach that stage -- pretty much every PSU we have used in the past is uber loud at full throttle.

PC Power & Cooling provided this product to APH Networks to facilitate this report.

The PC Power & Cooling Silencer Mk III 600W is a fine mid-range power supply for approximately $70 after mail in rebate at press time. Really, it is a performance bargain. At the end of the day, what is there to complain about a cool looking white power supply with the performance to boot, according to our affiliates with professional load testing equipment?

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Page Index
1. Introduction, Packaging, Specifications
2. Physical Look - Outside
3. Physical Look - Inside
4. Minor Tests and Conclusion