Dell OptiPlex 990 DT vs. Dell Vostro 5090

Comparison and Differences

Dell_OptiPlex_990_DT.jpg case front and back pannelDell_Vostro_5090.jpg case front and back pannel
Model
Form factorDesktopMini Tower
CPU optionsIntel Gen2 i3/i5/i7; Celeron; Pentium;Intel Gen9 i3/i5/i7/i9; Pentium; Celeron;
ChipsetQ67B360
Dedicated GPU *GeForce GTX 1650 Low ProfileGeForce RTX 2070 Super
RAMDIMM DDR3-1333DIMM DDR4-2666
RAM slots42
RAM speed1333 MT/s2666 MT/s
RAM max16 GB32 GB
USB ports(10x)USB-A 2.0; (4x)USB-A 2.0; (3x)USB-A 3.0; USB 3.0 Type C;
Video portsDisplayPort 1.2; VGA;HDMI 1.4; DisplayPort 1.4;
Other portsRJ45; Hdph; (2x) Mic; Line-Out; Line-In; PS2/COM; Serial; Parallel;RJ45; Hdph; Line-Out; Line-In;
Optional portsN.A.SD card reader
SATA ports34
PCI slotsPCIe 2.0 x16; PCIe 2.0 x4; PCIe 2.0 x1;PCIe 3.0 x16; (2x) PCIe 3.0 x1; PCI
M.2 slotsN.A.M.2 2230/2280 (PCIe 3.0 x4, NVMe); M.2 2230 (WiFi/BT);
Drive bays3.5in; 2.5in; 5.25in;3.5in;
PSU250 W260/460W
Weight7.56 kg (16.67 lb)7.90 kg (17.42 lbs)
Released20112019
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 990 DT and Dell Vostro 5090

If you are looking for a more modern desktop, then you should go with the Dell Vostro 5090 which was released in 2019. The Dell OptiPlex 990 DT is older and entered production in 2011.

If you are looking for the smaller form factor the Dell OptiPlex 990 DT is the right one for you. It is smaller than the Dell Vostro 5090 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 Vostro 5090 as it is running a newer generation CPU. This is not to say that Dell OptiPlex 990 DT is bad - it can still run some powerful CPUs, albeit being an older generation.

Memory

The Dell OptiPlex 990 DT has 4 RAM slots while the Dell Vostro 5090 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 Vostro 5090 is using the faster 2666 MT/s RAM. The Dell OptiPlex 990 DT is slower by supporting RAM speeds of up to 1333 MT/s. Additionally, if you will be needing a lot of RAM, better go for the Dell Vostro 5090 as it has the ability to run 32 GB of RAM. The Dell OptiPlex 990 DT 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 Vostro 5090 has 9 USB ports. The Dell OptiPlex 990 DT 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. None of the desktop models has a USB 3.1 port (10Gb/s), so if you need a fast connection to your peripherals, like external Solid State Drive, you will need to look elsewhere.

The DisplayPort is usually the more popular video port used with desktops and laptops, while the HDMI is used predominantly in consumer electronics. That's why, it is good to see that both of the models come with a DisplayPort.

The Dell Vostro 5090 comes with an HDMI port, while the Dell OptiPlex 990 DT 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 Vostro 5090 is better equipped as it comes with 4 SATA slot(s), while the Dell OptiPlex 990 DT 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 Vostro 5090. Sadly, the Dell OptiPlex 990 DT 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 990 DT comes with a decent 250 Watt PSU, but the Dell Vostro 5090 has a more powerful one rated at 460 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_990_DT_motherboard.jpg motherboard layoutDell_Vostro_5090_motherboard.jpg motherboard layout