Fujitsu Esprimo Q556 vs. Lenovo ThinkCentre M900 Tower

Comparison and Differences

Fujitsu_Esprimo_Q556.jpg case front and back pannel

Lenovo_ThinkCentre_M900_Tower.jpg case front and back pannel

Model
Form factor	Micro	Mini Tower
CPU options	Intel Gen6 i3/i5/i7; Pentium	Intel Gen6 i3/i5/i7; Celeron; Pentium;
Chipset	H110	Q170
Dedicated GPU *	N.A.	GeForce GTX 1660 Super
RAM	SODIMM DDR4-2133	DIMM DDR4-2133
RAM slots	2	4
RAM speed	2133 MT/s	2133 MT/s
RAM max	32 GB	64 GB
USB ports	(2x) USB-A 3.0; (4x) USB-A 2.0	(8x)USB-A 3.0;
Video ports	DisplayPort 1.2; DVI	(2x) DisplayPort 1.2; VGA;
Other ports	RJ45; Headphones; Mic; Line out; (1x) PS/2	RJ45; Hdph; (2x) Mic; Line-Out; Line-In; Serial;
Optional ports	VGA	2x USB-A 2.0; Media card reader (USB 2.0); (2x) PS2; eSATA;
SATA ports	2	3
PCI slots	N.A.	PCIe 3.0 x16; PCIe 3.0 x1; PCIe 3.0 x16 (wired x4); M2 to PCI adapter (optional);
M.2 slots	M.2 2280/2230 M-key (PCIe 2.0 x2, SSD); M.2 2230 (WiFi/BT)	M.2 (WiFi/BT or PCI extension card)
Drive bays	2.5in; 5.25 inch slim	(2x) 2.5/3.5in; (2x) 5.25in;
PSU	65 W	ATX 250/400 W
Weight	1.60 kg (3.53 lb)	12.5 kg (27.5 lb)
Released	2015	2015
Manual	link	link
Price**	Check Price	Check Price

** As an Amazon associate we earn from qualifying purchases.
* 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 Q556 and Lenovo ThinkCentre M900 Tower

Both computers, the Lenovo ThinkCentre M900 Tower and the Fujitsu Esprimo Q556, were released during the same year - 2015.

If you are looking for the smaller form factor the Fujitsu Esprimo Q556 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 Q556 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 Q556 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 Lenovo ThinkCentre M900 Tower has 8 USB ports. The Fujitsu Esprimo Q556 is inferior in this regard and packs 6 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 Q556 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 ports are placed on the system board and it is where you connect your HDD, SSD and Optical Disk Drives. More SATA slots will allow you to have more drives running at the same time. In this regard the Lenovo ThinkCentre M900 Tower is better equipped as it comes with 3 SATA slot(s), while the Fujitsu Esprimo Q556 has 2 slot(s).

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 Q556. 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 Q556 comes with a decent 65 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.