Dell OptiPlex 3070 SFF vs. Dell OptiPlex 7070 SFF

Comparison and Differences

Dell_OptiPlex_3070_SFF.jpg case front and back pannelDell_OptiPlex_7070_SFF.jpg case front and back pannel
Model
Form factorSmallSmall
CPU optionsIntel Gen8&9 i3/i5/i7; Celeron; Pentium;Intel Gen8&9 i3/i5/i7;
ChipsetH370Q370
Dedicated GPU *GeForce GT 1030 Low ProfileGeForce GTX 1650 Low Profile
RAMDIMM DDR4-2400/2666DIMM DDR4-2400/2666
RAM slots24
RAM speed2666 MT/s2666 MT/s
RAM max32 GB64 GB
USB ports(4x) USB-A 3.0; (4x) USB-A 2.0; USB 3.1 Type C; (5x) USB-A 3.0; (4x) USB-A 2.0;
Video portsDisplay Port 1.2; HDMI 1.4;(2x) Display Port 1.2;
Other portsRJ45; Headset; Line-Out; RJ45; Headset; Line-Out; Serial; (2x) PS2;
Optional portsSerial+PS2; DP1.2/HDMI2.0b/VGA; Media Card Reader; WiFi antenna; HDMI2.0b/DP1.2/VGA/USB Type-C (DP Alt Mode); Media Card Reader; WiFi antenna;
SATA ports23
PCI slotsPCIe 3.0 x16; PCIe x1;PCIe 3.0 x16; PCIe 3.0 x4 (open ended);
M.2 slotsM.2 2280/2230 M-key (PCIe 2.0 x4, NVMe); 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; 5.25in (slim);3.5in/(2x)2.5in; 5.25in (slim);
PSU200 W200 W
Weight5.26 kg (11.57 lb)5.26 kg (11.57 lb)
Released20192019
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 3070 SFF and Dell OptiPlex 7070 SFF

Both computers, the Dell OptiPlex 3070 SFF and the Dell OptiPlex 7070 SFF, were released during the same year - 2019.

Both models have the same form factor, meaning reoughtly they have the same phiysical size and form.

Processor

The two models have the same generation of Intel processors. We think that the 9 generation of Intel Processors have enough power to execute all of the home and office tasks that most people will care to do.

Memory

The Dell OptiPlex 7070 SFF has 4 RAM slots while the Dell OptiPlex 3070 SFF has only 2 slot(s). This is not something to worry about. Just make sure you take it into consideration when planning how much RAM you are going to use.

None of the desktops has an advantage when it comes to the speed of the RAM being used. Both models support RAM speeds of up to 2666. Additionally, if you will be needing a lot of RAM, better go for the Dell OptiPlex 7070 SFF as it has the ability to run 64 GB of RAM. The Dell OptiPlex 3070 SFF can do a bit less at max 32 GB. Most of the times, this should be sufficient for the majority of users.

Ports

In total the Dell OptiPlex 7070 SFF has 10 USB ports. The Dell OptiPlex 3070 SFF is inferior in this regard and packs 8 USB ports. In any case, if you miss USB ports, you can always purchase a USB hub. What is nice about the Dell OptiPlex 7070 SFF, is that it has 1 USB 3.1 port(s) which allows transfer of up to 10Gb/s. Unfortunately, the Dell OptiPlex 3070 SFF 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 7070 SFF comes with 2 ports, while the Dell OptiPlex 3070 SFF has only 1. If you are planning to use multiple monitors, the Dell OptiPlex 7070 SFF is the better choice.

The Dell OptiPlex 3070 SFF comes with an HDMI port, while the Dell OptiPlex 7070 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 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 7070 SFF is better equipped as it comes with 3 SATA slot(s), while the Dell OptiPlex 3070 SFF has 2 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 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

Looking at the Power Supply Unit (PSU) of the two models we don't see any differences. For either of them you get a maximum power of 200 Watts. However be careful, many models have more than one power supply option. When buying your computer, it is a good idea to get a version with the most powerful PSU. This will potentially allow you to upgrade to a more powerful GPU for example.

Motherboard

Dell_OptiPlex_3070_SFF_motherboard.jpg motherboard layoutDell_OptiPlex_7070_SFF_motherboard.jpg motherboard layout