Fujitsu D3544-S Power Consumption
We wanted to post a few figures from our testing that show the real selling point of the chips, low power.
Idle is around 9W and maximum power consumption hits just under 17W in our test bed. That low power consumption is helped by the fact that there is no BMC onboard and no fans needed for the platform. On the other hand, the RAM, drives, and NICs use a considerable amount of power.
Note these results were taken using 120V power, so 208V and higher may see lower power consumption.
Fujitsu D3544-S Fanless Operation
One of the standout features is that this unit does not need to utilize fans with the Fujitsu D3544-S series. Fujitsu sells heatsink and fan combos, but those are used to extend the temperature range that this solution can operate in.
Removing the need for fans means two things. First, that makes the Fujitsu D3544-S solution in the S500 chassis one that has no moving parts during operation. For machines that will be deployed in the field for years, that lowers the chances of needing to replace parts. Second, it lowers the overall power consumption. A 3W fan here would add almost 20% to the total power consumption. In a larger machine, a fan or two can have a negligible impact on power consumption. In this embedded range it can have a large impact on power consumption.
Overall, this is a great small machine. There are a few minor points we would address. First, we would prefer two Intel i210 NICs instead of a Realtek plus an Intel. That would open the door to a wide range of applications.
In terms of performance, this is far from the Atom of yesteryear. Gone are the days when for a low-power machine you would automatically assume sluggish performance. This little machine is equally at home providing POS or thin client duties as it is being a web server. For many sites outside of the top 100,000, this is more than enough to service them. Indeed, if you wanted a no-noise cluster getting several Fujitsu D3544-S units can make sense. They are fanless and have a better feature set than the Intel June Canyon NUC.
Overall the unit was extremely well built. The motherboard was well labeled and has solid documentation. The case was sturdy while allowing enough cooling to run fanless. On our team, we have been referring the Fujitsu D3544-S as a surprise favorite.