Dell OptiPlex 3090 M vs. HP EliteDesk 800 G3 SFF

Comparison and Differences

Dell_OptiPlex_3090_M.jpg case front and back pannelHP_EliteDesk_800_G3_SFF.jpg case front and back pannel
Model
Form factorMicroSmall
CPU optionsIntel Gen10 i3/i5/i7; Pentium; Celeron;Intel Gen6&7 i3/i5/i7; Celeron; Pentium;
ChipsetQ470Q270
Dedicated GPU *N.A.GeForce GT 1030 Low Profile
RAMSODIMM DDR4-2666/2933DIMM DDR4-2400
RAM slots24
RAM speed2933 MT/s2400 MT/s
RAM max64 GB64 GB
USB ports(4x) USB-A 3.0; (2x) USB-A 2.0;USB-C 3.0; (6x)USB-A 3.0; (4x)USB-A 2.0;
Video ports(2x) Display Port 1.4;(2x) DisplayPort;
Other portsRJ45; Headset; Line-Out;RJ45; Hdph; Headset; Line-Out; Line-In;
Optional portsHDMI 2.0b/Displayport/VGA;DP/HDMI/VGA/USB-C(DP); Serial; SD card reader;
SATA ports13
PCI slotsN.A.PCIe 3.0 x16; (2x) PCIe 3.0 x1; PCIe 3.0 x16 (wired x4);
M.2 slotsM.2 2280/2230 M-key (PCIe 3.0 x4, NVMe); M.2 2230 (WiFi/BT) M.2 2280 M-key (PCIe x4); M.2 2230 (WiFi/BT);
Drive bays2.5in;2.5in; (2x) 3.5in; 5.25in (slim);
PSU65 W180 W
Weight1.28 kg (2.82 lb)5.3 kg (11.7 lb)
Released20212017
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 M and HP EliteDesk 800 G3 SFF

If you are looking for a more modern desktop, then you should go with the Dell OptiPlex 3090 M which was released in 2021. The HP EliteDesk 800 G3 SFF is older and entered production in 2017.

If you are looking for the smaller form factor the Dell OptiPlex 3090 M is the right one for you. It is smaller than the HP EliteDesk 800 G3 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 3090 M as it is running a newer generation CPU. This is not to say that HP EliteDesk 800 G3 SFF is bad - it can still run some powerful CPUs, albeit being an older generation.

Memory

The HP EliteDesk 800 G3 SFF has 4 RAM slots while the Dell OptiPlex 3090 M 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.

The Dell OptiPlex 3090 M is using the faster 2933 MT/s RAM. The HP EliteDesk 800 G3 SFF is slower by supporting RAM speeds of up to 2400 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 EliteDesk 800 G3 SFF has 10 USB ports. The Dell OptiPlex 3090 M is inferior in this regard and packs 5 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.

DisplayPort is crucial for any desktop machine. It is good to see that both models are featuring DisplayPorts. However, the HP EliteDesk 800 G3 SFF comes with 2 ports, while the Dell OptiPlex 3090 M has only 1. If you are planning to use multiple monitors, the HP EliteDesk 800 G3 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 EliteDesk 800 G3 SFF is better equipped as it comes with 3 SATA slot(s), while the Dell OptiPlex 3090 M 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 Dell OptiPlex 3090 M comes with a decent 65 Watt PSU, but the HP EliteDesk 800 G3 SFF 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_3090_M_motherboard.jpg motherboard layoutHP_EliteDesk_800_G3_SFF_motherboard.jpg motherboard layout