Dell OptiPlex 3090 SFF vs. HP ProDesk 400 G6 Mini

Comparison and Differences

Dell_OptiPlex_3090_SFF.jpg case front and back pannelHP_ProDesk_400_G6_Mini.jpg case front and back pannel
Model
Form factorSmallMicro
CPU optionsIntel Gen 10 i3/i5/i7/i9; PentiumIntel Gen10 i3/i5/i7; Celeron; Pentium;
ChipsetQ470Q470
Dedicated GPU *AMD Radeon RX 6400 Low ProfileN.A.
RAMDIMM DDR4-2666SODIMM DDR4-3200
RAM slots22
RAM speed2666 MT/s3200 MT/s
RAM max64 GB64 GB
USB ports(4x) USB-A 2.0; (4x) USB-A 3.0;USB-C 3.1; USB-A 3.1; (3x) USB-A 3.0; (2x) USB-A 2.0;
Video portsDisplay Port 1.4a; HDMI 1.4b;DisplayPort; HDMI;
Other portsRJ45; Audio; Line-Out/In;RJ45; Headset;
Optional portsHDMI 2.0b/Displayport/VGA;DP1.4/HDMI2.0/VGA/Serial/USB-C; Serial/(2x)USB-A3.1; WiFi anntena;
SATA ports21
PCI slotsPCIe 3.0 x16; (2x) PCIe 3.0 x1;N.A.
M.2 slotsM.2 2230/2280 (PCIe 4.0 x4, NVMe); M.2 2230 (WiFi/BT) M.2 2280 M-key (PCIe x4); M.2 2230 (WiFi/BT)
Drive bays3.5in; 2.5in; 5.25in (slim);2.5in;
PSU200 W65 W
Weight5.10 kg (11.25 lb)1.25 kg (2.74 lb)
Released20212020
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 3090 SFF and HP ProDesk 400 G6 Mini

If you are looking for a more modern desktop, then you should go with the Dell OptiPlex 3090 SFF which was released in 2021. The HP ProDesk 400 G6 Mini is older and entered production in 2020.

If you are looking for the smaller form factor the HP ProDesk 400 G6 Mini is the right one for you. It is smaller than the Dell OptiPlex 3090 SFF and will fit more easily under your desk.

Processor

The two models have the same generation of Intel processors. We think that the 10 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.

The HP ProDesk 400 G6 Mini is using the faster 3200 MT/s RAM. The Dell OptiPlex 3090 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 Dell OptiPlex 3090 SFF has 8 USB ports. The HP ProDesk 400 G6 Mini is inferior in this regard and packs 7 USB ports. In any case, if you miss USB ports, you can always purchase a USB hub. What is nice about the HP ProDesk 400 G6 Mini, is that it has 2 USB 3.1 port(s) which allows transfer of up to 10Gb/s. Unfortunately, the Dell OptiPlex 3090 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 3090 SFF comes with 2 ports, while the HP ProDesk 400 G6 Mini has only 1. If you are planning to use multiple monitors, the Dell OptiPlex 3090 SFF is the better choice.

The HP ProDesk 400 G6 Mini comes with an HDMI port, while the Dell OptiPlex 3090 SFF does not support the interface. Of course missing HDMI port is something that can be easily fixed with a good adapter (e.g. DisplayPort to HDMI).

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 Dell OptiPlex 3090 SFF is better equipped as it comes with 2 SATA slot(s), while the HP ProDesk 400 G6 Mini has 1 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

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 G6 Mini comes with a decent 65 Watt PSU, but the Dell OptiPlex 3090 SFF has a more powerful one rated at 200 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_3090_SFF_motherboard.jpg motherboard layoutHP_ProDesk_400_G6_Mini_motherboard.jpg motherboard layout