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Small black rectangular mini PC with front ports visible

DELL

DELL OptiPlex 3090 Micro desktop PC i5 10500T 8GB 256GB NVMe

SKU CH-DCQS-ZP3S7

Tiny business desktop with a six-core i5, 8 GB DDR4, 256 GB NVMe storage and Windows 11 Pro

  • Screen sizeNo Screen
  • ProcessorIntel Core i5 10th Gen
  • Memory size8 GB DDR4
  • Storage drive256 GB SSD
  • GraphicsIntel UHD Graphics 630
  • CPUi5 10500T
  • Six-core 10th Gen i5 handles multitasking smoothly
  • 8 GB DDR4 memory keeps everyday apps responsive
  • 256 GB NVMe SSD boots Windows 11 Pro fast
  • Micro chassis fits behind a monitor or on a shelf
  • Dual DisplayPort outputs drive two modern screens

Compact business desktop for office tasks

The OptiPlex 3090 Micro is a new mini PC built around a 10th generation Intel Core i5 10500T processor with six cores and twelve threads running at 2.3 GHz. It ships with 8GB of DDR4 memory and a 256GB NVMe SSD, plus Windows 11 Pro pre-installed. Integrated Intel UHD 630 graphics drive two DisplayPort outputs, while Gigabit Ethernet and Wi-Fi handle connectivity.

Suits space-constrained offices.

This desktop fits workers who need a quiet, small footprint machine for productivity apps, web browsing and video calls. The 35 W processor keeps heat low in tight spaces. Buyers who want more storage, additional memory slots, discrete graphics or legacy VGA and DVI ports without adapters should look at something else.

35 W six-core CPU defines thermal

The i5 10500T operates at a 35 W base power, which dictates the cooling capacity required in the Micro chassis and sets the sustained performance level for business workloads. This single figure determines whether the system meets your power and thermal constraints.

How it compares

Measured against everything we stock in Tower & Compact Desktop PCs, at today’s prices. Recalculated every night.

Price $243.99
Cheaper than about 82% of the 14,711 comparable items (median $494.99).
Memory size 8 GB DDR4
Lower than about 80% of the 5,840 comparable items (median 16 GB).
RAM capacity 8 GB DDR4
Lower than about 80% of the 13,125 comparable items (median 16 GB).

Specifications

Product
Brand nameDELL
Product lineOptiPlex
Model name3090
Product typeBusiness Desktops & Workstations
Recommended useBusiness
Product colorBlack
Processor
ProcessorIntel Core i5 10th Gen
CPUi5 10500T
CPU modelIntel Core i5-10500T
Processor cache12 MB L3 Cache
L3 cache per CPU12 MB
Memory
Memory size8 GB DDR4
RAM capacity8 GB DDR4
Total memory slots2
Storage
Storage drive256 GB SSD
SSD storage256 GB NVMe
Storage configurationPCI Express NVMe
Optical driveNo
Second disc drive typeNone
Disk controllerPCI Express NVMe
Display
Screen sizeNo Screen
Touch inputNo
Display capabilitiesDual Monitor Supported via Display Port
Graphics
GraphicsIntel UHD Graphics 630
GPUIntel UHD 630
GPU interfaceIntegrated video
Audio & video
SpeakersSet Not Included
Connectivity
Wi-Fi standardWi-Fi 6
Network speed10/100/1000 Mbit/s
Wired networkGigabit Ethernet
Wireless adapterNone
Ethernet controllerIntegrated
Wi-Fi802.11ac Wireless LAN
Bluetooth supportYes
Ports & slots
External ports1x Ethernet
Front USB ports1
Front audio jacks2
Video connectors2 Display Port
Rear USB ports4
Ethernet port1 port
Size & build
Form factorMini PC
Compatibility
Windows 11 supportReady
In the box
Included monitorNot included
Bundled mouseNot Included
In the boxDesktop Computer preloaded with Windows and OEM wattage appropriate AC adapter.
Software
Operating systemWindows 11 Pro
More details
AI capabilityCopilot+ PC
Cooling methodAir Cooling
KeyboardNot Included

Condition and safety notices

Reproduced word for word from the maker or refurbisher: notices like these are not ours to rephrase.

Condition notice
Previously Used, Seller Refurbished. Desktop may show minor signs of wear but will be in good condition.

Questions about this item

How do I install the 256GB NVMe drive in the 3090 Micro and what step is often missed?

The M.2 slot sits under the bottom cover secured by a single captive screw; the step most people skip is inserting the drive at the correct angle before pressing it down and tightening the retaining screw.

What maintenance or replacement will the 8GB DDR4 memory need later?

The two SODIMM slots support up to 64GB total; if you need more capacity you add or swap DDR4 modules — no other memory type fits.

What limit appears first on the i5 10500T during sustained 35W workloads?

The 35W power envelope and the compact air-cooling system cause the CPU to hit its thermal ceiling before the 12MB L3 cache or six cores become the bottleneck.

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