Test Results

First we tested the four pumps, without the load of the water block and radiator. With the help of a digital multimeter and a trimmer, we measured the minimum start voltage. For each new pump, we proceeded to vent the air from the system, in order to make this step faster and prevent the repechage by the pump, of the air bubbles.We proceeded to measure the flow multiple times ​​and to calculate the average, to provide a precise estimate. Accuracy of flow meter is not in doubt. We repeated the test with the water block and the radiator connected, using the same methodology.We used the LAFAYETTE DMB-6 sound level meter for the detection of the noise of the pumps in operation.To avoid contamination of the test with the noise generated by moving liquid, we have isolated the pump every time in a cube with sound-absorbing material.To have a comparison element, we included in the test our test pump, the Swiftech MCP355 with the XSPC Reservoir Top; as a rotor, the latter, uses a turbine in magnetic suspension. Below we will analyze the charts.

We start from the first graph comparing the value of the minimum startup voltage of idle pumps, that is only pump - flowmeter - bowl.

As we see the yield of the 3 pumps in relation to the flow, that we will see in subsequent tests, is high. We continue however with the graph representing the values ​​of noise generated by pumps in idle.

As we can see the pump that generates more noise, with a value of 35 dB, is the most powerful of the Phobya series, the DC12-400. The quieter is the smallest of the Phobya series, the DC12-220.

Consider now the first of the two graphs referred to the comparison of pumps flow.Here are the flow rates of pumps spun always at idle load.

Here, too, as was logical, the most powerful of the series is the Phobya DC12-400 with a quite high value; just below the 400 l/h. But the comparison does not hold with our reference pump that holds the record with just below 482 l/h.Let's see how they behave the pumps put under stress.

Here too the situation remains proportional to the previous graph. The positions remain unchanged even if with lower flow rates. The first two pumps, the DC12-220 and DC12-260 does not bear the comparison and return values ​​below average while are able to maintain an acceptable value in the first two positions the DC12-400 and our reference pump, the MCP-355, which maintains the record.