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Black and silver Dell OptiPlex 990 mini tower desktop with keyboard and mouse

DELL

DELL OptiPlex 990 Mini Tower i7-2600 16 GB DDR3 512 GB SSD + 2 TB HDD

SKU CH-K77A-E9KAM

A mini-tower desktop with an Intel Core i7-2600 quad-core processor, 16 GB DDR3 memory, a 512 GB SSD plus 2 TB hard drive, DVD-RW drive, Windows 10 Pro, and included keyboard and mouse

  • Screen sizeNo Screen
  • ProcessorIntel Core i7 2nd Gen
  • Memory size16 GB DDR3
  • Storage drive2.5 512 GB Solid State (SSD) + 2 TB (2,000 GB) Hard Drive
  • GraphicsIntel HD Graphics 2000
  • ChipsetIntel Q67
  • Intel Core i7-2600 quad-core at 3.40 GHz handles demanding tasks
  • 16 GB DDR3 memory supports smooth multitasking
  • 512 GB SSD plus 2 TB HDD gives fast boot and vast storage
  • Windows 10 Pro 64-bit pre-installed for immediate productivity
  • DVD-RW drive and Gigabit Ethernet provide media and network flexibility

Ready for daily office work

The Dell OptiPlex 990 Mini Tower pairs an Intel Core i7-2600 quad-core processor running at 3.40 GHz with 16 GB of DDR3 memory. A 512 GB solid-state drive handles the operating system and active files while a 2 TB hard drive adds bulk storage. Windows 10 Pro 64-bit arrives pre-installed alongside a USB keyboard and mouse.

Quiet 265 W operation

The 265 W power supply feeds the CPU, integrated Intel HD Graphics 2000, Gigabit Ethernet and a 16X DVD±RW drive without demanding extra connectors. In typical office tasks the system stays cool and the single chassis fan runs at low speed, keeping background noise to a minimum for shared workspaces.

Steady throughput on long tasks

Turbo Boost can lift the processor to 3.80 GHz for short bursts, but sustained workloads such as large file copies or extended compiles settle at the base clock once thermal limits are reached. The combination of SSD responsiveness and high-capacity HDD space keeps multi-hour projects moving without thermal throttling interruptions.

How it compares

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

Price $643.99
Pricier than about 60% of the 14,711 comparable items (median $494.99).
Memory size 16 GB DDR3
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
Model name990
Part number990
Product typeStudent / Home Office
Recommended useConsumer
Product colorBlack/Silver
Processor
ProcessorIntel Core i7 2nd Gen
CPU model3.4 GHz
CPU socketLGA 1155
ChipsetIntel Q67
Memory
Memory size16 GB DDR3
RAM capacity16 GB DDR3
RAM type and speedDDR3
Memory configuration2 GB x 4
Total memory slots4
Free memory slots0
Memory slots0/4
Max supported RAM16 GB
Storage
Storage drive2.5 512 GB Solid State (SSD) + 2 TB (2,000 GB) Hard Drive
SSD storage1 TB
Hard drive2 TB
Disc drive16X DVD±RW Drive
Drive interfaceSATA
Optical driveDVD-R/RW
Display
Screen sizeNo Screen
Graphics
GraphicsIntel HD Graphics 2000
GPUIntel HD Graphics 2000
GPU interfaceIntegrated video
Audio & video
SoundSound card - Integrated
Audio chipIntegrated
Connectivity
Network speed10/100/1000 Mbit/s
Wired networkGigabit Ethernet
Ethernet controllerIntegrated
Bluetooth supportYes
Ports & slots
Front USB ports4
PS/2 ports2
Video connectors1 VGA, 1 Display Ports
Rear USB ports6
Ethernet port1 port
Rear audio jacks1x Headphone, 1x Microphone, 1x Line In
Power
Power supply265 W
Size & build
Form factorDIMM 240-pin
Overall dimensions14.2 × 6.9 × 16.4
Product weight19.55 lb (8.87 kg)
In the box
Included monitorNO
Bundled mouseUSB Mouse
Pointing deviceUSB Mouse
Software
Operating systemWindows 10 Pro
Pre-installed softwareWindows 10 Pro Instaled
More details
KeyboardUSB Keyboard
Keyboard typeUSB Keyboard

Other versions of this model

5 more in the same range

Questions about this item

How do I install the DDR3 memory in the 240-pin DIMM slots and what step do people get wrong?

Power off and unplug the mini tower, open the side panel, align the notch on each DDR3 module with the 240-pin slot key, press down firmly until both retention clips click, then close the case. The step people miss is seating both ends evenly so both clips engage.

What maintenance or replacement will the 265W power supply and the 2.5 512 GB SSD plus 2 TB hard drive need later?

The 265W power supply may need replacement if fan noise increases or voltages drift after several years. The 2.5 512 GB SSD has no moving parts but can wear out after heavy write cycles; the 2 TB hard drive should be monitored for SMART errors and replaced if bad sectors appear.

What limit shows up first under sustained use with the Intel HD Graphics 2000 and 16 GB DDR3?

The Intel HD Graphics 2000 will hit its performance ceiling first during sustained 3D or video workloads, while the 16 GB DDR3 and i7-2600 at 3.40 GHz with 3.80 GHz turbo typically remain within capacity for general multitasking.

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