HP ProDesk 400 G6 SFF vs. HP ProDesk 600 G4 SFF

Comparison and Differences

HP_ProDesk_400_G6_SFF.jpg case front and back pannel

HP_ProDesk_600_G4_SFF.jpg case front and back pannel

Model
Form factor	Small	Small
CPU options	Intel Gen8&9 i3/i5/i7; Celeron; Pentium;	Intel Gen8 i3/i5/i7; Celeron; Pentium;
Chipset	B360	Q370
Dedicated GPU *	GeForce GT 1030 Low Profile	GeForce GT 1030 Low Profile
RAM	DIMM DDR4-2666	DIMM DDR4-2666
RAM slots	2	4
RAM speed	2666 MT/s	2666 MT/s
RAM max	64 GB	64 GB
USB ports	(4x)USB-A 3.0; (4x)USB-A 2.0;	USB-C 3.1; (4x)USB-A 3.1; (2x)USB-A 3.0; (4x)USB-A 2.0;
Video ports	DisplayPort; VGA;	(2x) DisplayPort:
Other ports	RJ45; Headset; Line-In; Line-Out;	RJ45; Headset; Line-Out; Line-In;
Optional ports	SD card reader; Serial; Serial and (2x) PS2; DP/HDMI/VGA/USB-C;	DP1.2/HDMI2.0/VGA/USB-C(DP); Serial; SD card reader;
SATA ports	2	3
PCI slots	PCIe 3.0 x16; PCIe 3.0 x1 ;	PCIe 3.0 x16; PCIe x4 (open ended);
M.2 slots	M.2 2280/2230 M-key (PCIe x4); M.2 2230 (WiFi/BT)	M.2 2280/2230 M-key (PCIe x4); M.2 2230 (WiFi/BT);
Drive bays	(2x) 2.5/3.5in; 5.25in (slim);	(2x)2.5in/3.5in; 5.25in (slim);
PSU	180 W	180 W
Weight	4.6 kg (10.14 lb)	4.54 kg (10.01 lb)
Released	2019	2018
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 G6 SFF and HP ProDesk 600 G4 SFF

If you are looking for a more modern desktop, then you should go with the HP ProDesk 400 G6 SFF which was released in 2019. The HP ProDesk 600 G4 SFF is older and entered production in 2018.

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 400 G6 SFF as it is running a newer generation CPU. This is not to say that HP ProDesk 600 G4 SFF is bad - it can still run some powerful CPUs, albeit being an older generation.

Memory

The HP ProDesk 600 G4 SFF has 4 RAM slots while the HP ProDesk 400 G6 SFF 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 2666. 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 G4 SFF has 11 USB ports. The HP ProDesk 400 G6 SFF 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. What is nice about the HP ProDesk 600 G4 SFF, is that it has 5 USB 3.1 port(s) which allows transfer of up to 10Gb/s. Unfortunately, the HP ProDesk 400 G6 SFF has no such port, thus restricting your transfer speeds significantly. For people who want to use external drives on regular basis, this might be an issue.

DisplayPort is crucial for any desktop machine. It is good to see that both models are featuring DisplayPorts. However, the HP ProDesk 600 G4 SFF comes with 2 ports, while the HP ProDesk 400 G6 SFF has only 1. If you are planning to use multiple monitors, the HP ProDesk 600 G4 SFF 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 HP ProDesk 600 G4 SFF is better equipped as it comes with 3 SATA slot(s), while the HP ProDesk 400 G6 SFF has 2 slot(s).

When your goal is to have the fastest SSD transfer speeds, an M.2 interface is crucial. Thus, it is good that both models have M.2 SSD slots. Today M.2 SSDs are not much more expensive than the average SATA drives, so it really does not make sense to invest in SATA drives anymore.

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.