Dell OptiPlex 3070 SFF vs. Dell OptiPlex 5040 MT

Comparison and Differences

Dell_OptiPlex_3070_SFF.jpg case front and back pannelDell_OptiPlex_5040_MT.jpg case front and back pannel
ModelDell OptiPlex 3070 SFFDell OptiPlex 5040 MT
Form factorSmallMini Tower
CPU optionsIntel Gen8&9 i3/i5/i7; Celeron; Pentium;Intel Gen6 i3/i5/i7
ChipsetH370Q170
Dedicated GPU *GeForce GT 1030 Low ProfileGeForce GTX 1650 Super
RAMDIMM DDR4-2400/2666DIMM DDR3L-1600
RAM slots24
RAM speed2666 MT/s1600 MT/s
RAM max32 GB16 GB
USB ports(4x) USB-A 3.0; (4x) USB-A 2.0; (6x) USB-A 3.0; (4x) USB-A 2.0;
Video portsDisplay Port 1.2; HDMI 1.4;(2x) Display Port 1.2; HDMI 1.4;
Other portsRJ45; Headset; Line-Out; Serial; (2x) PS2; RJ45; Headset; Line-Out;
Optional portsSerial+PS2; DP1.2/HDMI2.0b/VGA; Media Card Reader; WiFi antenna; VGA; Media Card Reader;
SATA ports24
PCI slotsPCIe 3.0 x16; PCIe x1;PCIe 3.0 x16; PCIe 3.0 x16 (wired x4); PCIe 3.0 x1; PCI;
M.2 slotsM.2 2280/2230 M-key (PCIe 2.0 x4, SATA); M.2 2230 (WiFi/BT) M.2 2280 M-key (PCIe 3.0 x4, SATA 3.0)
Drive bays3.5-inch/(2x)2.5-inch; 5.25-inch (slim);3.5-inch/5.25-inch; (2x) 2.5-inch; 5.25-inch (slim);
PSU200 W240 W
Weight5.26 kg (11.57 lb)8.00 kg (17.64 lb)
Released20192015
Manuallinklink
* 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 3070 SFF and Dell OptiPlex 5040 MT

If a more modern desktop is what you are looking for, then you should go with the Dell OptiPlex 3070 SFF which was released in 2019. The Dell OptiPlex 5040 MT is older and entered production in 2015.

If you are looking for the smaller form factor the Dell OptiPlex 3070 SFF is the right one for you. It is smaller than the Dell OptiPlex 5040 MT 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 3070 SFF as it is running a newer generation CPU. This is not to say that Dell OptiPlex 5040 MT is bad - it can still run some powerful CPUs, albeit being an older generation.

Memory

The Dell OptiPlex 5040 MT has 4 RAM slots while the Dell OptiPlex 3070 SFF has only 2 slot(s). Of course this is not something to worry about. Just make sure you take it into consideration when planning how much RAM will your system be using.

The Dell OptiPlex 3070 SFF is using the faster 2666 MT/s RAM. The Dell OptiPlex 5040 MT is slower by supporting RAM speeds of only up to 1600 MT/s. Additionally, if you will be needing a lot of RAM, better go for the Dell OptiPlex 3070 SFF as it has the ability to run 32 GB of RAM. The Dell OptiPlex 5040 MT can do a bit less at max 16 GB. Most of the times, this should be sufficient for most users.

Ports

In total the Dell OptiPlex 5040 MT has 10 USB ports. The Dell OptiPlex 3070 SFF is inferior in this regard and packs 8 USB ports. None of the desktop models has a USB 3.1 port (10Gb/s), so if you need a fast connection to your peripherals you will need to look at other models.

DisplayPort is crucial for any desktop machine. It is good to see that both models are featuring DisplayPorts. However, the Dell OptiPlex 5040 MT comes with 2 ports, while the Dell OptiPlex 3070 SFF has only 1.

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

SATA port 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 5040 MT is better equipped as it comes with 4 SATA 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 buy SATA drives anymore.

Remark: Make sure that the M.2 slot supports the PCIe (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 6 Gb/s, while the PCIe 3.0 x4 will support speeds up to 32 Gb/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 3070 SFF comes with a decent 200 Watt PSU, but the Dell OptiPlex 5040 MT has a more powerful one rated at 240 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.

Motherboard

Dell_OptiPlex_3070_SFF_motherboard.jpg motherboard layoutDell_OptiPlex_5040_MT_motherboard.jpg motherboard layout

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