HP ProDesk 400 G2.5 SFF vs. Lenovo ThinkCentre E73 Tower

Comparison and Differences

HP_ProDesk_400_G2.5_SFF.jpg case front and back pannel

Lenovo_ThinkCentre_E73_Tower.jpg case front and back pannel

Model
Form factor	Small	Mini Tower
CPU options	Intel Gen4 i3/i5/i7; Celeron; Pentium;	Intel Gen4 i3/i5/i7; Pentium;
Chipset	H81	H81
Dedicated GPU *	GeForce GT 1030 Low Profile	Radeon RX 550
RAM	DIMM DDR3-1600	DIMM DDR3-1600
RAM slots	2	2
RAM speed	1600 MT/s	1600 MT/s
RAM max	16 GB	16 GB
USB ports	(2x)USB-A 3.0; (6x)USB-A 2.0;	(2x)USB-A 3.0; (4x)USB-A 2.0;
Video ports	DisplayPort; VGA;	DisplayPort; VGA;
Other ports	RJ45; Hdph; Mic; Line-Out; Line-In; Serial; (2x) PS2;	RJ45; Hdph; (2x) Mic; Line-Out; Line-In;
Optional ports	Media card reader; Serial; Parallel;	Serial; Media card reader (USB 2.0);
SATA ports	3	3
PCI slots	PCIe x16; PCIe x1;	PCIe 3.0 x16; (2x) PCIe 2.0 x1;
M.2 slots	N.A.	N.A.
Drive bays	3.5in; 5.25in (slim)	(2x) 2.5/3.5in; 5.25in;
PSU	180 W	ATX 180 W
Weight	4.5 kg (9.92 lb)	7.5 kg (16.53 Ib)
Released	2014	2013
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 400 G2.5 SFF and Lenovo ThinkCentre E73 Tower

If you are looking for a more modern desktop, then you should go with the HP ProDesk 400 G2.5 SFF which was released in 2014. The Lenovo ThinkCentre E73 Tower is older and entered production in 2013.

If you are looking for the smaller form factor the HP ProDesk 400 G2.5 SFF is the right one for you. It is smaller than the Lenovo ThinkCentre E73 Tower and will fit more easily under your desk.

Processor

The two models have the same generation of Intel processors. We think that the 4 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 (2 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 1600. In addition, you will be able to install the same amount of RAM in both models, and most probably 16 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 400 G2.5 SFF has 8 USB ports. The Lenovo ThinkCentre E73 Tower 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.

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 HP ProDesk 400 G2.5 SFF, nor the Lenovo ThinkCentre E73 Tower 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 180 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.