Start-up and shut-down voltage
This chapter should be read with caution and attention as long as the fans are not purely analog, i.e. DC-controlled fans with 3-pin connection. The PWM control electronics almost always stand in the way of clean voltage regulation and it is therefore also not advisable to regulate PWM fans via voltage. Nevertheless, we have also carried out this measurement for all models, regardless of whether they are DC or PWM fans, because even strange results say a lot about the control electronics and the use as a DC-controlled fan.
But first, to be on the safe side, we check the maximum speed at 100% PWM and compare it with the datasheet. The fan manages the given data approximately, of course, a smaller series dispersion is always in play here. You can easily ignore the missing 20 rpm.
In today’s DC test, we see that the fan only starts up with voltages starting at about 5.5 volts (MSI specifies 6 volts), while Noctua’s fan requires at least 4.4 volts. In addition, all PWM fans achieve maximum speed and sufficient throughput as well as static pressure only when PWM-controlled. So I would not recommend a pure voltage regulation.
The roughly under 200 rpm is an outstanding value for such a fan, although rather useless in practice. But you are very well in the race here and even beats Noctua clearly.
Start-up and shut-down behaviour
The following measurement curves once again illustrate the very different behaviour. Let’s look at DC control first. Here also at approx. 4.3 volts the under 200 rpm are reached, with which one lies very well in the race. Below that comes the intentional fan stoppage.
We can also see very well in the PWM protocol the pronounced start-up pulse at 512 RPM, which was set so succinctly for safety and which also pleases in this form because it is not a howl. The rest then reflects the data from the bar chart.
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