Fujitsu Siemens S400: Hardware 




Fujitsu Siemens Futro S400 Thin Client

Fujitsu Siemens Futro S400 Thin Client orientation The Fujitsu Siemens S400 is one of the larger thin clients around. It's neatly packaged but is at the upper end of the power consumption stakes. I guess this is why it carries the warning label shown here. The top of the unit does get hot while in use.


The basic specs for the S400 are:

AMD NX1500
512MB CF
256MB/512MB (max 1GB?)
   Max resolution
32 bit colors, 1600 x 1200 / 85 Hz
4 x USB2.0
Kybd & mouse
12V 4.2A (Label)
H x W x D (mm)246 x 48 x 177

My S400 came with Windows XPe. It was also fitted with a Matrox F7003-0301 video card. This is a 32MB PCI video card with both VGA and DVI outputs.

The S400 is fitted with SiS 963L / SiS 741CX chipset:

The SiS741CX chipset supports the AMD Geode NX processor family, DDR266 front side bus, as well as high-speed DDR333 DRAM. Furthermore, the SiS741CX chipset incorporates SiS's revolutionary HyperStreaming Technology, which provides multiple divided pipelines for data, allows data to be sent concurrently, and separates data for easier memory retrieval, resulting in a remarkable reduction in latency versus traditional chipsets.

SiS964 / SiS963L will be coupled with SiS741CX as the south bridge chipset, which integrates with Serial ATA high-speed transfer interface. The SiS964 / SiS963L supports Dual-Channel parallel ATA, 8 built-in USB2.0 ports, full 5.1 channel surround sound, V.90 modem and Ethernet network.

Power Supply

The S400 uses an external power supply. The one that came with the S400 was manufactured by Linearity and provides 12V at 5A. The power connector is one of those 4-pin types similar to that used by the Neoware CA2.

The power supply connector (DP-003-R) is not one that's readily available on the high street. However, when I first encountered it, an on-line search found me a UK supplier - Toby Electronics - for those who want to fit the right connector to an existing power supply.

Futro S400 power As you can see from the label the connections on the plug are:

Pin 1&2 : +12V
Pin 3&4 : GND


The S400 is fitted with an AMD NX1500 clocked at 1GHz.

The Linux cpuinfo reports:

cpu family:6
model name:AMD Athlon(tm) Processor
flags:fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse syscall mp mmxext 3dnowext 3dnow

The CPU is socketed so there is an opportunity for the more adventurous to try alternative CPUs. The Geode NX processors use Socket A and so various Athlon processors may work. (Others have experimented with the HP t5720 which also use the same CPU).


The output from the Linux lspci command:

00:00.0 Host bridge: Silicon Integrated Systems [SiS] 741/741GX/M741 Host (rev 03)
00:01.0 PCI bridge: Silicon Integrated Systems [SiS] SG86C202
00:02.0 ISA bridge: Silicon Integrated Systems [SiS] SiS963 [MuTIOL Media IO] (rev 25)
00:02.1 SMBus: Silicon Integrated Systems [SiS] SiS961/2/3 SMBus controller
00:02.5 IDE interface: Silicon Integrated Systems [SiS] 5513 [IDE]
00:02.7 Multimedia audio controller: Silicon Integrated Systems [SiS] SiS7012 AC'97 Sound Controller (rev a0)
00:03.0 USB Controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f)
00:03.1 USB Controller: Silicon Integrated Systems [SiS] USB 1.1 Controller (rev 0f)
00:03.2 USB Controller: Silicon Integrated Systems [SiS] USB 2.0 Controller
00:09.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8169 Gigabit Ethernet (rev 10)
01:00.0 VGA compatible controller: Silicon Integrated Systems [SiS] 661/741/760 PCI/AGP or 662/761Gx PCIE VGA Display Adapter


This is fairly straight forward, but you'll need a torx screwdriver.

First remove the two screws that hold on the front cover. The front cover can then be gently slid forward. I found it to be a snug fit and it needed a bit of gentle encouragement to move.

Next remove the two screws on the rear that hold on the top cover. This can then be removed, but the problem here is that there are two slightly sticky pads on the top of the CPU heat sink, and one on the Northbridge chip's heatsink. These make contact with the case. They are obviously there to help dissipate the heat. Once again it's a case of applying some gentle pressure and waiting for the metal case to come free from them.

You'll find that there is an internal microswitch fitted to the backpanel which will operate if the cover is removed.



CPU: As mentioned above this is a Socket A processor and could be replaced by an alternative..

Flash: The board is fitted with an Compact Flash socket so increasing the size of the flash is easy. There is also a 40-pin IDE socket. I haven't yet experimented with that. (But see this link.)

RAM: The board has a single SODIMM socket for DDR memory. Mine came fitted with a 256MB Samsung part - M470L3224HU0-CB3. This is PC2700S CL2.5 part. A Samsung 512MB part - M470L6524BT0-CB3 also worked. I have no 1GB DDR part to try.

The S400 datasheet does mention that, with the XPe version, the memory supported is "256, 512, (1GB only via CUZ)". I have no idea what CUZ means. A datasheet for the S400 mentions DDR333 as the RAM specification.

USB: There are two USB 2.0 sockets on the front and two on the rear.

There is also an onboard 10-pin connector - J5 - that is used to connect an optional smartcard reader. This is missing pins 7 & 8 which means it cannot be wired as a conventional USB header. I haven't checked it myself, but I've seen mentioned elsewhere that it is similar, but that the GND connections have been moved to pins 9 & 10.

PCI: There is a PCI socket. My S400 came with a small right-angle riser card and a Matrox video card.

Proprietary: There is another connector adjacent to the PCI socket and parallel to the rear panel. The manual says "You can fit a module (e.g. WLAN module or DVI module) in the installation slot."

Click on the photograph to get a more detailed view of the circuit board.


Any comments? email me. Added August 2013    Last update May 2015