Dell OptiPlex 7000 SFF vs. Dell XPS 8940

Comparison and Differences

Dell_OptiPlex_7000_SFF.jpg case front and back pannelDell_XPS_8940.jpg case front and back pannel
Model
Form factorSmallMini Tower
CPU optionsIntel Gen 12 i3/i5/i7/i9;Intel Gen10 & 11 i3/i5/i7;
ChipsetQ670H470
Dedicated GPU *AMD Radeon RX6400 Low ProfileGeForce RTX 3080
RAMDIMM DDR4-3200DIMM DDR4-2666/2933
RAM slots44
RAM speed3200 MT/s2666 MT/s
RAM max128 GB128 GB
USB ports(4x) USB-A 2.0; (3x) USB-A 3.0; (2x) USB-A 3.1; USB-C 3.2;USB 3.0 Type C; USB 3.1 Type A; (2x) USB-A 2.0; (7x) USB-A 3.0;
Video ports(3x) Display Port 1.4a;HDMI 2.0; DisplayPort 1.4;
Other portsRJ45; Audio; Line-Out/In;RJ45; Mic; Headset; Card Reader;
Optional portsHDMI 2.0b/Displayport/VGA/PS2/serial/USB Type-C; Serial port; SD-card slotN.A.
SATA ports33
PCI slotsPCIe 4.0 x16; PCIe 3.0 x4;PCIe 3.0 x16; PCIe x4; PCIe x1;
M.2 slotsM.2 2230/2280 (PCIe 4.0 x4, NVMe); M.2 2280; M.2 2230; M.2 2230 (WiFi/BT) M.2 2280/2230 M-key (PCIe 3.0 x4, NVMe); M.2 2230 (WiFi/BT);
Drive bays3.5in; (2x) 2.5in;(3x) 3.5in;
PSU240/260/300 W500 W
Weight5.30 kg (11.69 lb)6.3 kg (13.89 lb)
Released20222020
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 7000 SFF and Dell XPS 8940

If you are looking for a more modern desktop, then you should go with the Dell OptiPlex 7000 SFF which was released in 2022. The Dell XPS 8940 is older and entered production in 2020.

If you are looking for the smaller form factor the Dell OptiPlex 7000 SFF is the right one for you. It is smaller than the Dell XPS 8940 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 7000 SFF as it is running a newer generation CPU. This is not to say that Dell XPS 8940 is bad - it can still run some powerful CPUs, albeit being an older generation.

Memory

Both models have have equal amount of ram slots (4 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 7000 SFF is using the faster 3200 MT/s RAM. The Dell XPS 8940 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 128 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 10. If this is not enough, using a USB hub is always a viable option. It's great that both of the models have USB 3.1 ports which will allow you to exchange data with your peripherals at up to 10Gb/s. But if you need maximum connectivity, go with the Dell OptiPlex 7000 SFF as it has 2 USB3.1 ports (the Dell XPS 8940 has 1).

DisplayPort is crucial for any desktop machine. It is good to see that both models are featuring DisplayPorts. However, the Dell OptiPlex 7000 SFF comes with 3 ports, while the Dell XPS 8940 has only 1. If you are planning to use multiple monitors, the Dell OptiPlex 7000 SFF is the better choice.

The Dell XPS 8940 comes with an HDMI port, while the Dell OptiPlex 7000 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 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 3 SATA slot(s). Keep in mind that having too few SATA slots might limit your options for connecting additional memory drives.

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 7000 SFF has 1 M.2 slots while the Dell XPS 8940 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 Dell OptiPlex 7000 SFF comes with a decent 300 Watt PSU, but the Dell XPS 8940 has a more powerful one rated at 500 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_7000_SFF_motherboard.jpg motherboard layoutDell_XPS_8940_motherboard.jpg motherboard layout