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Black and silver mini tower desktop with keyboard and mouse

DELL

DELL OptiPlex 990 Mini Tower i7-2600 16 GB DDR3 1TB SSD 3TB HDD Windows 10 Pro desktop PC

SKU CH-QXHB-K6SSR

A desktop computer with a quad-core 3.40 GHz processor, 16 GB DDR3 memory, 1 TB SSD plus 3 TB hard drive, DVD-RW drive, Gigabit Ethernet and Windows 10 Pro, supplied with keyboard and mouse

  • Screen sizeNo Screen
  • ProcessorIntel Core i7 2nd Gen
  • RAM capacity16 GB DDR3
  • SSD storage1 TB
  • GraphicsIntel HD Graphics 2000
  • ChipsetIntel Q67
  • Quad-core i7-2600 at 3.40 GHz with 3.90 GHz turbo handles heavy multitasking
  • 16 GB DDR3 memory maxed out for smooth multi-application workflows
  • 1 TB SSD plus 3 TB HDD gives fast boot and vast storage
  • Windows 10 Pro 64-bit pre-installed for immediate productivity
  • Gigabit Ethernet and DVD-RW drive provide wired speed and disc access

Dell OptiPlex 990 Mini Tower desktop

This Dell OptiPlex 990 Mini Tower is a desktop computer built around an Intel Core i7-2600 processor with four cores and eight threads. It ships with 16 GB of DDR3 memory, a 1 TB SSD paired with a 3 TB hard drive, and Windows 10 Pro already installed. A DVD-RW drive, keyboard and mouse are included in the box.

265 W power supply and integrated audio

The system draws power from a 265 W supply and uses integrated graphics and audio. Gigabit Ethernet provides wired networking, while a 16X DVD±RW drive handles optical media. No discrete graphics card or separate sound card is fitted, keeping heat and noise at modest levels for typical office tasks.

Quad-core i7-2600 at 3.40 GHz with 3.90 GHz Turbo

The i7-2600 runs at a 3.40 GHz base frequency and can reach 3.90 GHz under Turbo Boost when thermal headroom allows. Sustained multi-threaded workloads will remain at elevated clocks until the 265 W power limit or the Mini Tower's cooling capacity is reached, after which speeds taper to stay within thermal limits.

How it compares

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

Price $488.99
Typical for this category: the median of 14,711 items is $494.99.
RAM capacity 16 GB DDR3
Typical for this category: the median of 13,125 items is 16 GB.
SSD storage 1 TB
Higher than about 60% of the 11,342 comparable items (median 512 GB).

Specifications

Product
Brand nameDELL
Product lineOptiPlex
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
RAM capacity16 GB DDR3
Memory configuration4 GB x 4
Total memory slots4
Free memory slots0
Memory slots0/4
Max supported RAM16 GB
Storage
SSD storage1 TB
Hard drive3 TB
Disc drive16X DVD±RW Drive
Drive interfaceSATA
Optical driveDVD-R/RW
Display
Screen sizeNo Screen
Graphics
GraphicsIntel 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 Port
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
In the box
Included monitorNot included
Pointing deviceUSB Mouse
Software
Operating systemWindows 10 Pro
More details
Keyboard typeUSB Keyboard

Questions about this item

How do I install the 240-pin DDR3 memory in the OptiPlex 990 and what step is often missed?

Power off, open the Mini Tower case, align the notch on the DIMM with the slot key, press firmly until both retention clips click, then verify 16 GB appears in BIOS before booting Windows 10 Pro.

Which component in this desktop will most likely need replacement first?

The 265W power supply is the part most likely to require replacement after several years of continuous operation, while the 1TB SSD and 3TB HDD have no moving parts or spinning platters that wear at the same rate.

What thermal or power limit appears first when the i7-2600 runs at 3.90 GHz Turbo Boost under sustained load?

The 265W power supply and Mini Tower airflow become the limiting factors before the CPU hits its thermal ceiling, causing the processor to drop from 3.90 GHz Turbo Boost back toward 3.40 GHz base frequency.

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