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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

  • TypeStudent / Home Office
  • Form FactorDIMM 240-pin
  • UsageConsumer
  • ColorBlack/Silver
  • Processor Main Features64 bit Processor
  • Memory16 GB DDR3
  • 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.

Highlights

  • 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

Specifications

BrandDELL
SeriesOptiPlex
Model990
Part Number990
TypeStudent / Home Office
Form FactorDIMM 240-pin
UsageConsumer
ColorBlack/Silver
Processor Main Features64 bit Processor
Memory16 GB DDR3
Storage2.5 512 GB Solid State (SSD) + 2TB (2,000GB) Hard Drive
Optical Drive16X DVD±RW Drive
GraphicsIntel HD Graphics 2000
AudioSound card - Integrated
EthernetGigabit Ethernet
Power Supply265W
MonitorNO
KeyboardUSB Keyboard
MouseUSB Mouse
Operating SystemWindows 10 Pro
Software IncludedWindows 10 Pro Instaled
ChipsetIntel Q67
CPU TypeIntel Core i7 2nd Gen
Installed Qty1
Max Supported Qty1
CPU Name3.40GHz
CPU Socket TypeLGA 1155
CPU Main Features64 bit Processor
GPU/VGA TypeIntel HD Graphics 2000
Graphics InterfaceIntegrated video
Memory Capacity16GB DDR3
Memory SpeedDDR3
Memory Spec2 GB x 4
Memory Slot (Total)4
Memory Slot (Available)0
Memory Slots (Available/Total)0/4
Maximum Memory Supported16 GB
SSD1TB
HDD2TB
HDD InterfaceSATA
Optical Drive TypeDVD-R/RW
Screen SizeNo Screen
Audio ChipsetIntegrated
LAN ChipsetIntegrated
LAN Speed10/100/1000Mbps
BluetoothYes
Front USB4
PS/22
Video Ports1 VGA, 1 Display Ports
Rear USB6
RJ451 port
Rear Audio Ports1x Headphone, 1x Microphone, 1x Line In
Keyboard TypeUSB Keyboard
Mouse TypeUSB Mouse
Dimensions (H x W x D)14.2 x 6.9 x 16.4
Weight19.55Lbs

Other versions of this model

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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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