Fujitsu Esprimo D556 vs. Lenovo ThinkCentre M900 Tower

Comparison and Differences

Fujitsu_Esprimo_D556.jpg case front and back pannelLenovo_ThinkCentre_M900_Tower.jpg case front and back pannel
Model
Form factorSmallMini Tower
CPU optionsIntel Gen6 i3/i5/i7; Pentium; CeleronIntel Gen6 i3/i5/i7; Celeron; Pentium;
ChipsetH110Q170
Dedicated GPU *Radeon RX 6400 Low ProfileGeForce GTX 1660 Super
RAMUDIMM DDR4-2133DIMM DDR4-2133
RAM slots24
RAM speed2133 MT/s2133 MT/s
RAM max32 GB64 GB
USB ports(4x) USB-A 3.0; (6x) USB-A 2.0(8x)USB-A 3.0;
Video portsDisplayPort 1.2; DVI(2x) DisplayPort 1.2; VGA;
Other portsRJ45; Headphones; Mic; Line in; Line out; PS/2RJ45; Hdph; (2x) Mic; Line-Out; Line-In; Serial;
Optional portsVGA; eSATA2x USB-A 2.0; Media card reader (USB 2.0); (2x) PS2; eSATA;
SATA ports33
PCI slotsPCIe 3.0 x16; PCIe 2.0 x1; PCIe 2.0 x16 (wired x4)PCIe 3.0 x16; PCIe 3.0 x1; PCIe 3.0 x16 (wired x4); M2 to PCI adapter (optional);
M.2 slotsM.2 2280/2230 M-key (PCIe 2.0 x2, SSD)M.2 (WiFi/BT or PCI extension card)
Drive bays(3x) 3.5in; 5.25 inch(2x) 2.5/3.5in; (2x) 5.25in;
PSU280 WATX 250/400 W
Weight8.00 kg (17.64 lb)12.5 kg (27.5 lb)
Released20152015
Manuallinklink
Price**Check PriceCheck Price

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* Dedicated GPU warning: Check if your particular power supply model has enough power. Additionally some PSUs don't come with an auxiliary PCIe power connector and you may need to buy a SATA to PCIe power adapter.

Differences between Fujitsu Esprimo D556 and Lenovo ThinkCentre M900 Tower

Both computers, the Lenovo ThinkCentre M900 Tower and the Fujitsu Esprimo D556, were released during the same year - 2015.

If you are looking for the smaller form factor the Fujitsu Esprimo D556 is the right one for you. It is smaller than the Lenovo ThinkCentre M900 Tower and will fit more easily under your desk.

Processor

The two models have the same generation of Intel processors. We think that the 6 generation of Intel Processors have enough power to execute all of the home and office tasks that most people will care to do.

Memory

The Lenovo ThinkCentre M900 Tower has 4 RAM slots while the Fujitsu Esprimo D556 has only 2 slot(s). This is not something to worry about. Just make sure you take it into consideration when planning how much RAM you are going to use.

None of the desktops has an advantage when it comes to the speed of the RAM being used. Both models support RAM speeds of up to 2133. Additionally, if you will be needing a lot of RAM, better go for the Lenovo ThinkCentre M900 Tower as it has the ability to run 64 GB of RAM. The Fujitsu Esprimo D556 can do a bit less at max 32 GB. Most of the times, this should be sufficient for the majority of users.

Ports

In total the Fujitsu Esprimo D556 has 10 USB ports. The Lenovo ThinkCentre M900 Tower is inferior in this regard and packs 8 USB ports. In any case, if you miss USB ports, you can always purchase a USB hub. None of the desktop models has a USB 3.1 port (10Gb/s), so if you need a fast connection to your peripherals, like external Solid State Drive, you will need to look elsewhere.

DisplayPort is crucial for any desktop machine. It is good to see that both models are featuring DisplayPorts. However, the Lenovo ThinkCentre M900 Tower comes with 2 ports, while the Fujitsu Esprimo D556 has only 1. If you are planning to use multiple monitors, the Lenovo ThinkCentre M900 Tower is the better choice.

None of the models has an HDMI port. If your monitor supports only the HDMI interface, you will need to buy an adapter. Such adapters are cheap so nothing to worry about.

SATA slots are located on the motherboard and it is where SSD, HDD and Optical Disk Drives are connected. Each of the two models being compared have 3 SATA slot(s). Keep in mind that having too few SATA slots might limit your options for connecting additional memory drives.

If you want the fastest transfer speeds for your SSD, an M.2 interface is crucial. Thus, if the M.2 SSD slot is a mandatory requirement for you, go with the Fujitsu Esprimo D556. Sadly, the Lenovo ThinkCentre M900 Tower has no such slot, and you will be forced to use the SATA interface instead.

Make sure that the available M.2 slot supports the PCIe (also called NVMe) interface. This is important as there are M.2 slots which support only the inferior SATA III interface. For comparison, the SATA III interface has max speeds of 6Gb/s, while the PCIe 3.0 x4 will support speeds up to 32Gb/s!

Power Supply

Having a Power Supply Unit with high power rating is important, if you are going to use components which require extra power. The Fujitsu Esprimo D556 comes with a decent 280 Watt PSU, but the Lenovo ThinkCentre M900 Tower has a more powerful one rated at 400 Watts. Choosing either one depends on your specific requirements and use case. Also don't forget that some models might have more than one PSU option - try to always get the most powerful one, especially if you plan to upgrade to a powerful GPU.

Motherboard

Fujitsu_Esprimo_D556_motherboard.jpg motherboard layoutLenovo_ThinkCentre_M900_Tower_motherboard.jpg motherboard layout