Dell OptiPlex 5070 SFF vs. Dell OptiPlex 7040M

Comparison and Differences

Dell OptiPlex 5070 SFF case front and back pannelDell OptiPlex 7040M case front and back pannel
ModelDell OptiPlex 5070 SFFDell OptiPlex 7040M
Form factorSmallMicro
CPU optionsIntel Gen8&9 i3/i5/i7; Celeron; Pentium;Intel Gen6 i3/i5/i7
ChipsetIntel Q370Intel Q170
Dedicated GPU *GeForce GTX 1650 Low ProfileN.A.
RAM typeDIMM DDR4-2400/2666SODIMM DDR4-2133
RAM slots42
RAM speed26662133
RAM max6432
USB PortsUSB 3.1 Type C; (5x) USB-A 3.0; (4x) USB-A 2.0; (6x) USB-A 3.0
Video Ports(2x) Display Port 1.2; Display Port 1.2; HDMI 1.4;
Other PortsRJ45; Headset; Line-Out; RJ45; Headset; Line-Out;
Optional PortsHDMI2.0b/DP1.2/VGA/USB Type-C (DP Alt Mode); Serial+PS2; Media Card Reader; WiFi antenna; WiFi antenna; Display Port 1.2; VGA; Serial; Serial+PS2;
SATA ports31
PCIe 2.0 x16; (3x) PCIe 2.0 x1PCIe 3.0 x16 (low profile); PCIe 3.0 x4 (open ended, low profile);N.A.
M.2 slotsM.2 2280/2230 M-key (PCIe 3.0 x4, SATA); M.2 2230 (WiFi/BT) M.2 2280 M-key (PCIe 3.0 x4, SATA 3.0); M.2 2230(WiFi/BT)
Drive bays3.5-inch/(2x)2.5-inch; 5.25-inch (slim); 2.5-inch
PSU200 W65 W
Weight5.26 kg (11.57 lb)1.41 kg (3.12 lb)
* 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.

The difference between Dell OptiPlex 5070 SFF and Dell OptiPlex 7040M

This page will compare the Dell OptiPlex 5070 SFF and Dell OptiPlex 7040M desktop computers. If you are wondering what is the difference between the Dell OptiPlex 5070 SFF and Dell OptiPlex 7040M, you are at the right place. We've prepared also a comparison table where you can check the differences in more detail.

If a more modern desktop is what you are looking for, then you should go with the Dell OptiPlex 5070 SFF which was released in 2019. The Dell OptiPlex 7040M is a bit older and entered production in 2015.

For some use cases size is important. If you are looking for the smaller form factor the Dell OptiPlex 7040M is the right one for you. It is smaller than the Dell OptiPlex 5070 SFF and will fit easier under your desk.

The 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 5070 SFF as it is running a newer generation CPU. This is not to say that Dell OptiPlex 7040M is bad - it can still run some powerful CPUs, albeit being an older generation.


The Dell OptiPlex 5070 SFF has 4 RAM slots while the Dell OptiPlex 7040M has only 2 slots. Of course this is not something to worry about. Just make sure you take it into account when planning how much RAM will your system be using. The Dell OptiPlex 5070 SFF is using the faster 2666 RAM. On the otherhand, the Dell OptiPlex 7040M is slower by supporting RAM speeds of only up to 2133. If you will be needing a lot of RAM, better go for the Dell OptiPlex 5070 SFF as it has the ability to run 64 GB of RAM. The Dell OptiPlex 7040M can do a bit less at 32 GB, but this should be enough for most users.


What is nice about the Dell OptiPlex 5070 SFF, is that it has USB 3.1 port(s) which allows transfer of up to 10Gb/s. Unfortunately, the Dell OptiPlex 7040M has no such port, thus restricting your transfer speeds a bit.

DisplayPort is crucial for any desktop machine. It is good to see that both models are featuring DisplayPorts. However, the Dell OptiPlex 5070 SFF comes with 2 ports, while the Dell OptiPlex 7040M has only 1.

The Dell OptiPlex 7040M comes with an HDMI port which is version 1.4, while the Dell OptiPlex 5070 SFF does not support the HDMI interface. Of course missing HDMI port is something that can be easily fixed with a good adapter (e.g. DP to HDMI).

SATA slot is where SSD, HDD and Optical Disk Drives are connected. More SATA slots will allow you to have more Disk Drives running at the same time. In this regard the Dell OptiPlex 5070 SFF is better equipped as it comes with 3 SATA slots, while the Dell OptiPlex 7040M has only 1 slots.

When your goal is to have the fastest transfer speeds for your SSD, M.2 interface is crucial. Thus, it is good that both models have an M.2 SSD slot(s). Today M.2 SSDs are not much more expensive than the average SATA drives, so it really does not make sense to buy SATA drives anymore.
Remark: If you want the fastest M.2 SSD interface, make sure that the slot supports the PCIe interface. Compared to the SATA III, the PCIe 3.0 x4 is more than 5 times faster (6Gb/s vs. 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 7040M comes with a decent 65 Watt PSU, but the Dell OptiPlex 5070 SFF has a more powerful one rated at 200 Watts. Choosing either one depends on your specific requirements and use case.

The Motherboard

Dell OptiPlex 5070 SFF motherboard layoutDell OptiPlex 7040M motherboard layout

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