Fujitsu D3544 S Rear IO
Fujitsu D3544 S Rear IO

The Fujitsu D3544-S is a very small, yet surprisingly robust platform. The mini-STX form factor means that it is only 140mm x 148mm in size. At the same time, it is a passively cooled quad-core platform with low power consumption and plenty of I/O. We are going to take a look at the top end variant, the Fujitsu D3544-S3 to see what this low power platform can offer.

Fujitsu D3544-S Hardware Overview

The Fujitsu D3544-S is a diminutive platform. It measures only 5.5″ x 5.8″ which is almost a 30% smaller footprint than mITX at 6.7″ x 6.7″. The platform supports a Gemini Lake series SoC along with a single SODIMM slot that takes up to 16GB of DDR4-2400.

Fujitsu D3544 S Three Quarter
Fujitsu D3544 S Three Quarter

For our test, we are going to test the third variant or the Fujitsu D3544-S3. For a compact and fanless appliance, the onboard Intel Pentium Silver J5005 quad-core SoC provides plenty of performance. We can understand why some may instead look for even lower power and less expensive parts.

Fujitsu D3544 S Motherboard Table
Fujitsu D3544 S Motherboard Table

This Intel Pentium Silver J5005 includes an 18EU Intel UHD 605 GPU which means it can easily drive dual 4K display outputs which are great for kiosks, digital signage, and even as low power desktops or thin clients.

For our testing, we also had the Fujitsu SMARTCASE S500 chassis with a matching passive heatsink. You are going to see the Fujitsu D3544-S3 in this chassis throughout our review.

Fujitsu D3544 S3 Top View
Fujitsu D3544 S3 Top View

For storage, there are two SATA III 6.0gbps ports. Next to these, there is a M.2 Key B socket (2242 / 2260 / 2280) that can handle a SATA III SSD or a PCIe x1 NVMe device. The other M.2 2230 module is designed for use with WLAN/ Bluetooth.

Fujitsu D3544 S3 SATA And M.2 PCIe
Fujitsu D3544 S3 SATA And M.2 PCIe

In our test system, we had an Innodisk M.2 (S42) 3ME4 SATA SSD. This is a 128GB DRAM-less unit which worked well during our testing.

Fujitsu D3544 S3 M.2 SATA Drive
Fujitsu D3544 S3 M.2 SATA Drive

There are a surprising number of headers onboard. These cover fans, COM ports, audio and USB ports among others.

Fujitsu D3544 S3 Edge Headers
Fujitsu D3544 S3 Edge Headers

Power input is via DC power. Our unit was supplied with a Fujitsu PSU which worked well. The downside here is that the unit requires an external power brick. The benefit is that this keeps the design small and power efficient.

Fujitsu D3544 S Power In And Dual Display Port
Fujitsu D3544 S Power In And Dual Display Port

For some sense of how the internal connectors work, here is an example of putting the Fujitsu D3544-S into the S500 chassis. Here we have a cable providing the 9-pin COM header to the rear panel. We also have a USB 3.1 Gen1 port via a cable that screws into the chassis. This type of layout means that one can customize the chassis design around the D3544-S.

Fujitsu D3544 S3 USB C And Serial Cables
Fujitsu D3544 S3 USB C And Serial Cables

Assembled, the unit has a robust rear panel I/O assortment. Beyond the COM and USB 3.1 ports, there are two DisplayPort headers each capable of 4K 60fps output. There are four USB 2.0 ports as well.

Fujitsu D3544 S Rear IO
Fujitsu D3544 S Rear IO

Two 1GbE ports are powered by two different network controllers. One is powered by an Intel i210 and the other by a Realtek RTL8111G. We would have preferred if both were Intel i210 NICs, however, we understand given the cost and thermal constraints why Realtek is used. The inclusion of even a single Intel i210 NIC in this class of product is impressive.

Put together in the S500 chassis, one can see a fanless model without moving parts. The large heatsink and chassis perforations enable airflow even in the tight quarters.

Fujitsu D3544 S Fanless System In Enclosure
Fujitsu D3544 S Fanless System In Enclosure

Moving to the front of the chassis there is a power button, two USB 3.0 ports, and headphone/ microphone ports. Onboard audio is provided by the Realtek ALC671 5.1-channel CODEC.

Fujitsu D3544 S System Front Panel View
  Fujitsu D3544 S System Front Panel View

The Fujitsu SMARTCASE S500 is a solid feeling unit. It comes with two “feet” that ensure the entire chassis gets airflow. We were pleasantly surprised by the versatility of this design either allowing horizontal or vertical orientation.

Fujitsu D3544 S System Vertical View
Fujitsu D3544 S System Vertical View

This solution was both simple and elegant in its execution to the point that we are surprised more vendors to not use a similar design. Fujitsu also offers VESA mounting if you want to mount the unit behind a display.

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