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Black Dell OptiPlex 3090 desktop tower with wired keyboard and mouse

DELL

DELL OptiPlex 3090 Desktop PC Core i5-10505 16GB DDR3 500GB SSD Windows 11 Pro

SKU CH-03KT-KE98P

Compact desktop with Intel Core i5-10505, 16 GB DDR3 memory and 500 GB SSD storage running Windows 11 Pro

  • ProcessorIntel Core i5 10th Gen
  • Memory size16 GB
  • SSD storage500 GB
  • CPUIntel 10th Generation Core i5
  • RAM capacity16 GB DDR3
  • Operating systemWindows 11 Pro
  • Intel Core i5-10505 hexa-core processor handles everyday workloads smoothly
  • 16 GB DDR3 memory supports multitasking and future upgrades to 64 GB
  • 500 GB SATA SSD provides fast boot and quick file access
  • Windows 11 Pro pre-installed with Wi-Fi and Bluetooth connectivity
  • Includes wired keyboard and mouse for immediate desktop use

Business desktop with 16 GB DDR3 and 500 GB SSD

The Dell OptiPlex 3090 is a compact desktop computer built around an Intel Core i5-10505 processor. It ships with 16 GB of DDR3 memory in a single module and a 500 GB SATA solid-state drive. Windows 11 Pro is pre-installed, and a wired keyboard and mouse are included in the box.

Suits office workers and home users who need

This system handles web browsing, email, video calls and document editing without difficulty. The single memory stick leaves one slot free for a future upgrade to 64 GB. Buyers who want more storage or faster memory than DDR3 should look at other configurations.

16 GB DDR3 in one of two slots

The memory specification is the detail that determines whether this unit fits your environment. It provides 16 GB of DDR3 memory across one occupied slot, with a second slot available to reach the 64 GB maximum. Match this to your memory-standard requirements before purchase.

How it compares

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

Price $430.99
Cheaper than about 55% of the 14,711 comparable items (median $494.99).
Memory size 16 GB
Typical for this category: the median of 5,840 items is 16 GB.
RAM capacity 16 GB DDR3
Typical for this category: the median of 13,125 items is 16 GB.

Specifications

Product
Brand nameDELL
Product lineOptiPlex
Year of release2020
Product colorBlack
Processor
ProcessorIntel Core i5 10th Gen
CPUIntel 10th Generation Core i5
CPU modelIntel Core i5-10505
Memory
Memory size16 GB
RAM capacity16 GB DDR3
Memory configuration16 GB x 1
Total memory slots2
Max supported RAM64 GB
Storage
SSD storage500 GB
Hard drive500 GB
Drive interfaceSATA
Size & build
Form factorDesktop
In the box
Pointing deviceUSB Mouse
In the box5G wifi/bluetooth adapter,wired keyboard and mouse
Software
Operating systemWindows 11 Pro
More details
Keyboard typeStandard

Questions about this item

How do I install the 16 GB DDR3 module in the OptiPlex 3090, and which step is often missed?

Power off and unplug the chassis, open the side panel, align the notch on the DDR3 stick with the slot key, press firmly until the retention clips click, then verify the firmware sees all 16 GB on the next boot.

What maintenance or replacement will the 500 GB SATA SSD and 16 GB DDR3 memory need later?

The SATA SSD has a finite write endurance; plan to replace it once SMART tools report high reallocated sectors, while the DDR3 module rarely fails but can be swapped if memory diagnostics show errors.

Which limit appears first when the Core i5-10505 runs sustained workloads inside this 3090 chassis?

The processor will reach its thermal ceiling before the 500 GB SSD or 16 GB DDR3 memory become bottlenecks, so sustained performance depends on the cooler and case airflow.

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