Dell OptiPlex 7090 M vs. HP ProDesk 400 G6 SFF

Comparison and Differences

Dell_OptiPlex_7090_M.jpg case front and back pannelHP_ProDesk_400_G6_SFF.jpg case front and back pannel
Model
Form factorMicroSmall
CPU optionsIntel Gen10&11 i3/i5/i7/i9;Intel Gen8&9 i3/i5/i7; Celeron; Pentium;
ChipsetQ570B360
Dedicated GPU *N.A.GeForce GT 1030 Low Profile
RAMSODIMM DDR4-2666/2933/3200DIMM DDR4-2666
RAM slots22
RAM speed3200 MT/s2666 MT/s
RAM max64 GB64 GB
USB portsUSB 3.2 Type C; (3x) USB-A 3.1; (x2) USB-A 3.0;(4x)USB-A 3.0; (4x)USB-A 2.0;
Video ports(2x) Display Port 1.4; (2x) mini Display Port 1.4;DisplayPort; VGA;
Other portsRJ45; Audio; Line-Out/In;RJ45; Headset; Line-In; Line-Out;
Optional portsSerial; PS2 port; VGA port; DisplayPort 1.4/HDMI 2.0/USB 3.2 Gen2 Type-CSD card reader; Serial; Serial and (2x) PS2; DP/HDMI/VGA/USB-C;
SATA ports02
PCI slotsN.A.PCIe 3.0 x16; PCIe 3.0 x1 ;
M.2 slotsM.2 2280/2230 M-key (PCIe 3.0 x4, NVMe); M.2 2280/2230 M-key (PCIe); M.2 2230 (WiFi/BT) M.2 2280/2230 M-key (PCIe x4); M.2 2230 (WiFi/BT)
Drive bays2.5in(2x) 2.5/3.5in; 5.25in (slim);
PSU90/130/180 W180 W
Weight1.38 kg (3.05 lbs)4.6 kg (10.14 lb)
Released20212019
Manuallinklink
Price**Check PriceCheck 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 Dell OptiPlex 7090 M and HP ProDesk 400 G6 SFF

If you are looking for a more modern desktop, then you should go with the Dell OptiPlex 7090 M which was released in 2021. The HP ProDesk 400 G6 SFF is older and entered production in 2019.

If you are looking for the smaller form factor the Dell OptiPlex 7090 M is the right one for you. It is smaller than the HP ProDesk 400 G6 SFF and will fit more easily under your desk.

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 Dell OptiPlex 7090 M as it is running a newer generation CPU. This is not to say that HP ProDesk 400 G6 SFF is bad - it can still run some powerful CPUs, albeit being an older generation.

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.

The Dell OptiPlex 7090 M is using the faster 3200 MT/s RAM. The HP ProDesk 400 G6 SFF is slower by supporting RAM speeds of up to 2666 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 400 G6 SFF has 8 USB ports. The Dell OptiPlex 7090 M 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. What is nice about the Dell OptiPlex 7090 M, is that it has 1 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 Dell OptiPlex 7090 M comes with 2 ports, while the HP ProDesk 400 G6 SFF has only 1. If you are planning to use multiple monitors, the Dell OptiPlex 7090 M 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 400 G6 SFF is better equipped as it comes with 2 SATA slot(s), while the Dell OptiPlex 7090 M has 0 slot(s).

An M.2 SSD can be several times faster than a SATA one. Thus, we are happy to see that both models support the M.2 interface. However, the Dell OptiPlex 7090 M has 1 M.2 slots while the HP ProDesk 400 G6 SFF comes with just 1.

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.

Motherboard

Dell_OptiPlex_7090_M_motherboard.jpg motherboard layoutHP_ProDesk_400_G6_SFF_motherboard.jpg motherboard layout