Lenovo ThinkCentre M800 Small vs. Lenovo ThinkCentre M900 Small

Comparison and Differences

Lenovo_ThinkCentre_M800_Small.jpg case front and back pannel

Lenovo_ThinkCentre_M900_Small.jpg case front and back pannel

Model
Form factor	Small	Small
CPU options	Intel Gen6 i3/i5/i7; Celeron; Pentium;	Intel Gen6 i3/i5/i7; Celeron; Pentium;
Chipset	Q150	Q170
Dedicated GPU *	GeForce GT 1030 Low Profile	GeForce GT 1030 Low Profile
RAM	DIMM DDR4-2133	DIMM DDR4-2133
RAM slots	4	4
RAM speed	2133 MT/s	2133 MT/s
RAM max	64 GB	64 GB
USB ports	(6x)USB-A 3.0; (2x)USB-A 2.0;	(8x)USB-A 3.0;
Video ports	(2x) DisplayPort 1.2; VGA;	(2x) DisplayPort 1.2; VGA;
Other ports	RJ45; Hdph; (2x) Mic; Line-Out; Line-In; Serial;	RJ45; Hdph; (2x) Mic; Line-Out; Line-In; Serial;
Optional ports	2x USB-A 2.0; Media card reader (USB 2.0); (2x) PS2; eSATA;	2x USB-A 2.0; Media card reader (USB 2.0); (2x) PS2; eSATA;
SATA ports	3	3
PCI slots	PCIe 3.0 x16; PCIe 3.0 x1; PCIe 3.0 x16 (wired x4); M2 to PCI adapter (optional);	PCIe 3.0 x16; PCIe 3.0 x1; PCIe 3.0 x16 (wired x4); M2 to PCI adapter (optional);
M.2 slots	M.2 (WiFi/BT or PCI extension card)	M.2 (WiFi/BT or PCI extension card)
Drive bays	2.5in; 2.5/3.5in; 5.25in (slim);	2.5in; 2.5/3.5in; 5.25in (slim);
PSU	TFX 210 W	TFX 210 W
Weight	9 kg (19.8 lb)	9 kg (19.8 lbs)
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 Lenovo ThinkCentre M800 Small and Lenovo ThinkCentre M900 Small

Both computers, the Lenovo ThinkCentre M800 Small and the Lenovo ThinkCentre M900 Small, were released during the same year - 2015.

Both models have the same form factor, meaning reoughtly they have the same phiysical size and form.

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

Both models have have equal amount of ram slots (4 RAM). Usually two RAM slots are more than enough for most cases. However, the count should be taken into account when planning how much and what combination of RAM you are going to need for your system.

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. In addition, you will be able to install the same amount of RAM in both models, and most probably 64 GB of RAM will be enough for most people. However, if you will be needing more RAM, make sure to check other desktop models too.

Ports

Both models have the same amount of USB ports for total count of 8. If this is not enough, using a USB hub is always a viable option. 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.

The DisplayPort is usually the more popular video port used with desktops and laptops, while the HDMI is used predominantly in consumer electronics. That's why, it is good to see that both of the models come with a DisplayPort.

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.

M.2 SSD interface allows you to transfer data with higher speeds compared to the old SATA interface. Unfortunately, neither the Lenovo ThinkCentre M800 Small, nor the Lenovo ThinkCentre M900 Small has one. However, you can still use a SATA SSD drive which should give you satisfactory performance.

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

Looking at the Power Supply Unit (PSU) of the two models we don't see any differences. For either of them you get a maximum power of 210 Watts. However be careful, many models have more than one power supply option. When buying your computer, it is a good idea to get a version with the most powerful PSU. This will potentially allow you to upgrade to a more powerful GPU for example.