Dell OptiPlex 7090 M vs. HP ProDesk 400 G3 Mini

Comparison and Differences

Dell_OptiPlex_7090_M.jpg case front and back pannelHP_ProDesk_400_G3_Mini.jpg case front and back pannel
Model
Form factorMicroMicro
CPU optionsIntel Gen10&11 i3/i5/i7/i9;Intel Gen6&7 i3/i5/i7; Celeron; Pentium;
ChipsetQ570H270
Dedicated GPU *N.A.N.A.
RAMSODIMM DDR4-2666/2933/3200SODIMM DDR4-2400
RAM slots22
RAM speed3200 MT/s2400 MT/s
RAM max64 GB32 GB
USB portsUSB 3.2 Type C; (3x) USB-A 3.1; (x2) USB-A 3.0;(4x)USB-A 3.0; (2x)USB-A 2.0;
Video ports(2x) Display Port 1.4; (2x) mini Display Port 1.4;DisplayPort;
Other portsRJ45; Audio; Line-Out/In;RJ45; Hdph; Mic/Headset; Serial;
Optional portsSerial; PS2 port; VGA port; DisplayPort 1.4/HDMI 2.0/USB 3.2 Gen2 Type-CDP/HDMI/VGA/Serial; WiFi antenna;
SATA ports01
PCI slotsN.A.N.A.
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 M-key (PCIe x4); M.2 2230 (WiFi/BT)
Drive bays2.5in2.5in
PSU90/130/180 W65/90 W
Weight1.38 kg (3.05 lbs)1.21 kg (2.67 lb)
Released20212016
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 G3 Mini

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 G3 Mini is older and entered production in 2016.

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 Dell OptiPlex 7090 M as it is running a newer generation CPU. This is not to say that HP ProDesk 400 G3 Mini 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 G3 Mini is slower by supporting RAM speeds of up to 2400 MT/s. Additionally, if you will be needing a lot of RAM, better go for the Dell OptiPlex 7090 M as it has the ability to run 64 GB of RAM. The HP ProDesk 400 G3 Mini can do a bit less at max 32 GB. Most of the times, this should be sufficient for the majority of users.

Ports

Both models have the same amount of USB ports for total count of 6. If this is not enough, using a USB hub is always a viable option. 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 G3 Mini 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 G3 Mini 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 G3 Mini is better equipped as it comes with 1 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 G3 Mini 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

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 400 G3 Mini comes with a decent 90 Watt PSU, but the Dell OptiPlex 7090 M has a more powerful one rated at 180 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.

Motherboard

Dell_OptiPlex_7090_M_motherboard.jpg motherboard layoutHP_ProDesk_400_G3_Mini_motherboard.jpg motherboard layout