Dell OptiPlex 7020 MT vs. Dell XPS 8940

Comparison and Differences

Dell_OptiPlex_7020_MT.jpg case front and back pannelDell_XPS_8940.jpg case front and back pannel
Model
Form factorMini TowerMini Tower
CPU optionsIntel Gen4 i3/i5/i7; Pentium; Intel Gen10 & 11 i3/i5/i7;
ChipsetQ87H470
Dedicated GPU *GeForce GTX 1660 SuperGeForce RTX 3080
RAMDIMM DDR3-1600 DIMM DDR4-2666/2933
RAM slots44
RAM speed1600 MT/s2666 MT/s
RAM max16 GB128 GB
USB ports(4x) USB-A 3.0; (6x) USB-A 2.0; USB 3.0 Type C; USB 3.1 Type A; (2x) USB-A 2.0; (7x) USB-A 3.0;
Video ports(2x) DisplayPort 1.2; VGA;HDMI 2.0; DisplayPort 1.4;
Other portsRJ45; Hdph; Mic; Line-Out; Line-In; Serial; (2x) PS2; RJ45; Mic; Headset; Card Reader;
Optional portsN.A.N.A.
SATA ports43
PCI slotsPCIe 3.0 x16; PCIe x1; PCIe x16(wired x4); PCI; PCIe 3.0 x16; PCIe x4; PCIe x1;
M.2 slotsN.A.M.2 2280/2230 M-key (PCIe 3.0 x4, NVMe); M.2 2230 (WiFi/BT);
Drive bays(2x) 2.5/3.5in; (2x) 5.25in(3x) 3.5in;
PSU ATX 290 W500 W
Weight9.40 kg (20.72 lb)6.3 kg (13.89 lb)
Released20142020
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 OptiPlex 7020 MT and Dell XPS 8940

If you are looking for a more modern desktop, then you should go with the Dell XPS 8940 which was released in 2020. The Dell OptiPlex 7020 MT is older and entered production in 2014.

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 XPS 8940 as it is running a newer generation CPU. This is not to say that Dell OptiPlex 7020 MT 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 XPS 8940 is using the faster 2666 MT/s RAM. The Dell OptiPlex 7020 MT is slower by supporting RAM speeds of up to 1600 MT/s. Additionally, if you will be needing a lot of RAM, better go for the Dell XPS 8940 as it has the ability to run 128 GB of RAM. The Dell OptiPlex 7020 MT can do a bit less at max 16 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 10. If this is not enough, using a USB hub is always a viable option. What is nice about the Dell XPS 8940, is that it has 1 USB 3.1 port(s) which allows transfer of up to 10Gb/s. Unfortunately, the Dell OptiPlex 7020 MT 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 7020 MT comes with 2 ports, while the Dell XPS 8940 has only 1. If you are planning to use multiple monitors, the Dell OptiPlex 7020 MT is the better choice.

The Dell XPS 8940 comes with an HDMI port, while the Dell OptiPlex 7020 MT 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 7020 MT is better equipped as it comes with 4 SATA slot(s), while the Dell XPS 8940 has 3 slot(s).

If you want the fastest transfer speeds for your SSD, an M.2 interface is crucial. Thus, if the M.2 SSD slot is a mandatory requirement for you, go with the Dell XPS 8940. Sadly, the Dell OptiPlex 7020 MT has no such slot, and you will be forced to use the SATA interface instead.

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 7020 MT comes with a decent 290 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_7020_MT_motherboard.jpg motherboard layoutDell_XPS_8940_motherboard.jpg motherboard layout