Dell OptiPlex 5090 MT vs. Dell Vostro 3902

Comparison and Differences

Dell_OptiPlex_5090_MT.jpg case front and back pannelDell_Vostro_3902.jpg case front and back pannel
Model
Form factorMini TowerMini Tower
CPU optionsIntel Gen10&11 i3/i5/i7;Intel Gen4 i3/i5/i7; Pentium; Celeron;
ChipsetQ570H81
Dedicated GPU *GeForce GTX 1660 SuperGeForce GTX 1660 Super
RAMDIMM DDR4-2666/2933/3200DIMM DDR3-1600
RAM slots42
RAM speed3200 MT/s1600 MT/s
RAM max128 GB16 GB
USB portsUSB 3.1 Type C; (x5) USB-A 3.0; (x4) USB-A 2.0;(6x)USB-A 2.0; (2x)USB-A 3.0;
Video ports(4x) Display Port 1.4; (x3) HDMI 2.0b; VGA;HDMI 1.2; VGA;
Other portsRJ45; Headset; Line-Out/In;RJ45; Hdph; (2x) Mic; Line-Out; Line-In; PS2
Optional portsVGA /DisplayPort 1.4/HDMI 2.0b/USB 3.2 Gen2 Type-C Port Alt-mode; SD Card;N/A
SATA ports44
PCI slotsPCIe 4.0 x16; PCIe 4.0 x4; (x2) PCIe x1;PCIe 2.0 x16; (2x) PCIe 2.0 x1; PCI
M.2 slotsM.2 2280/2230 M-key (PCIe 3.0 x4, NVMe); M.2 2230 (WiFi/BT) N.A.
Drive bays(x2) 3.5in; (2x) 2.5in; 5.25in (slim);3.5in; 5.25in;
PSU260/300/360 W300 W
Weight7.24 kg (15.95 lb)8.50 kg (18.73 lbs)
Released20212014
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 5090 MT and Dell Vostro 3902

If you are looking for a more modern desktop, then you should go with the Dell OptiPlex 5090 MT which was released in 2021. The Dell Vostro 3902 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 OptiPlex 5090 MT as it is running a newer generation CPU. This is not to say that Dell Vostro 3902 is bad - it can still run some powerful CPUs, albeit being an older generation.

Memory

The Dell OptiPlex 5090 MT has 4 RAM slots while the Dell Vostro 3902 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.

The Dell OptiPlex 5090 MT is using the faster 3200 MT/s RAM. The Dell Vostro 3902 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 OptiPlex 5090 MT as it has the ability to run 128 GB of RAM. The Dell Vostro 3902 can do a bit less at max 16 GB. Most of the times, this should be sufficient for the majority of users.

Ports

In total the Dell OptiPlex 5090 MT has 10 USB ports. The Dell Vostro 3902 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 5090 MT, is that it has 3 USB 3.1 port(s) which allows transfer of up to 10Gb/s. Unfortunately, the Dell Vostro 3902 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.

Unfortunately, only the Dell OptiPlex 5090 MT has a DisplayPort. The Dell Vostro 3902 does not have one? Don't worry though, nowadays video adapters are cheap and you can get almost any combination of conversion types.

The HDMI video interface is broadly used and the majority of the external displays support it. Thus, it is nice to see that both models have this video interface. If you are going to use multiple monitors go with the Dell OptiPlex 5090 MT which has 2 ports. The Dell Vostro 3902 has only 1 ports.

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 4 SATA slot(s). Keep in mind that having too few SATA slots might limit your options for connecting additional memory drives.

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 OptiPlex 5090 MT. Sadly, the Dell Vostro 3902 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 Vostro 3902 comes with a decent 300 Watt PSU, but the Dell OptiPlex 5090 MT has a more powerful one rated at 360 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_5090_MT_motherboard.jpg motherboard layoutDell_Vostro_3902_motherboard.jpg motherboard layout