HP ProDesk 600 G3 Microtower vs. Lenovo ThinkCentre M900 Tower

Comparison and Differences

HP_ProDesk_600_G3_Microtower.jpg case front and back pannel

Lenovo_ThinkCentre_M900_Tower.jpg case front and back pannel

Model
Form factor	Mini Tower	Mini Tower
CPU options	Intel Gen6&7 i3/i5/i7; Celeron; Pentium;	Intel Gen6 i3/i5/i7; Celeron; Pentium;
Chipset	Q270	Q170
Dedicated GPU *	GeForce GTX 1650	GeForce GTX 1660 Super
RAM	DIMM DDR4-2400	DIMM DDR4-2133
RAM slots	4	4
RAM speed	2400 MT/s	2133 MT/s
RAM max	64 GB	64 GB
USB ports	USB-C 3.0; (6x)USB-A 3.0; (4x)USB-A 2.0;	(8x)USB-A 3.0;
Video ports	(2x) DisplayPort:	(2x) DisplayPort 1.2; VGA;
Other ports	RJ45; Headset; Line-Out; Line-In;	RJ45; Hdph; (2x) Mic; Line-Out; Line-In; Serial;
Optional ports	DP/HDMI/VGA/USB-C(DP); Serial; SD card reader;	2x USB-A 2.0; Media card reader (USB 2.0); (2x) PS2; eSATA;
SATA ports	5	3
PCI slots	PCIe 3.0 x16; (2x) PCIe 3.0 x1; PCIe 3.0 x16 (wired x4);	PCIe 3.0 x16; PCIe 3.0 x1; PCIe 3.0 x16 (wired x4); M2 to PCI adapter (optional);
M.2 slots	M.2 2280/2230 M-key (PCIe x4); M.2 2230 (WiFi/BT);	M.2 (WiFi/BT or PCI extension card)
Drive bays	2.5in; (2x) 3.5in; 5.25in; 5.25in (slim);	(2x) 2.5/3.5in; (2x) 5.25in;
PSU	180/250 W	ATX 250/400 W
Weight	7.35 kg (16.2 lb)	12.5 kg (27.5 lb)
Released	2017	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 HP ProDesk 600 G3 Microtower and Lenovo ThinkCentre M900 Tower

If you are looking for a more modern desktop, then you should go with the HP ProDesk 600 G3 Microtower which was released in 2017. The Lenovo ThinkCentre M900 Tower is older and entered production in 2015.

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

Processor

Usually the newer the generation of the CPU, the better the performance and efficiency is. If your budget allows it, you should go with the HP ProDesk 600 G3 Microtower as it is running a newer generation CPU. This is not to say that Lenovo ThinkCentre M900 Tower is bad - it can still run some powerful CPUs, albeit being an older generation.

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.

The HP ProDesk 600 G3 Microtower is using the faster 2400 MT/s RAM. The Lenovo ThinkCentre M900 Tower is slower by supporting RAM speeds of up to 2133 MT/s. 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

In total the HP ProDesk 600 G3 Microtower has 11 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.

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 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 HP ProDesk 600 G3 Microtower is better equipped as it comes with 5 SATA slot(s), while the Lenovo ThinkCentre M900 Tower has 3 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 HP ProDesk 600 G3 Microtower. 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 HP ProDesk 600 G3 Microtower comes with a decent 250 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.