Dell Inspiron 3891 vs. Dell OptiPlex 3000 SFF

Comparison and Differences

Dell_Inspiron_3891.jpg case front and back pannelDell_OptiPlex_3000_SFF.jpg case front and back pannel
Model
Form factorMini TowerSmall
CPU optionsIntel Gen10&11 i3/i5/i7; Celeron; PentiumIntel Gen 12 i3/i5/i7/i9; Pentium
ChipsetB560B660
Dedicated GPU *GeForce GTX 1650 SuperAMD Radeon RX 6400 Low Profile
RAMDIMM DDR4-2666/2933DIMM DDR4-3200
RAM slots22
RAM speed2933 MT/s3200 MT/s
RAM max64 GB64 GB
USB ports(3x) USB 3.0 Type A; USB 3.0 Type C; (4x) USB-A 2.0;(4x) USB-A 2.0; (4x) USB-A 3.0;
Video portsHDMI 1.4; DisplayPort 1.4; VGA;Display Port 1.4a; HDMI 1.4b;
Other portsRJ45; Headset; Line-Out; Card Reader;RJ45; Audio; Line-Out/In;
Optional portsN.A.HDMI 2.0b/Displayport/VGA;
SATA ports22
PCI slotsPCIe 3.0 x16; PCIe 3.0 x1;PCIe 3.0 x16; PCIe 3.0 x1;
M.2 slotsM.2 2280/2230 M-key (PCIe 3.0 x4, NVMe); M.2 2230 (WiFi/BT); M.2 2230/2280 (PCIe 4.0 x4, NVMe); M.2 2230 (WiFi/BT)
Drive bays3.25in; 9.5mm3.5in; 2.5in;
PSU260 W180/300 W
Weight6.40 kg (14.11 lb)5.03 kg (11.09 lb)
Released20212022
Manuallinklink
Price**Check PriceCheck Price

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* 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 Inspiron 3891 and Dell OptiPlex 3000 SFF

If you are looking for a more modern desktop, then you should go with the Dell OptiPlex 3000 SFF which was released in 2022. The Dell Inspiron 3891 is older and entered production in 2021.

If you are looking for the smaller form factor the Dell OptiPlex 3000 SFF is the right one for you. It is smaller than the Dell Inspiron 3891 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 3000 SFF as it is running a newer generation CPU. This is not to say that Dell Inspiron 3891 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 3000 SFF is using the faster 3200 MT/s RAM. The Dell Inspiron 3891 is slower by supporting RAM speeds of up to 2933 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

Both models have the same amount of USB ports for total count of 8. If this is not enough, using a USB hub is always a viable option. 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.

The DisplayPort is usually the more popular video port used with desktops and laptops, while the HDMI is used predominantly in consumer electronics. That's why, it is good to see that both of the models come with a DisplayPort.

In case your monitor supports HDMI only, you will be happy to hear that both models come with an HDMI port.

SATA slots are located on the motherboard and it is where SSD, HDD and Optical Disk Drives are connected. Each of the two models being compared have 2 SATA slot(s). Keep in mind that having too few SATA slots might limit your options for connecting additional memory drives.

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 Inspiron 3891 comes with a decent 260 Watt PSU, but the Dell OptiPlex 3000 SFF has a more powerful one rated at 300 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_Inspiron_3891_motherboard.jpg motherboard layoutDell_OptiPlex_3000_SFF_motherboard.jpg motherboard layout