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Black and silver Dell OptiPlex 790 mini tower desktop computer with DVD-RW drive

DELL

DELL OptiPlex 790 Mini Tower i7-2600 3.40GHz 8GB DDR3 256GB SSD 1TB HDD

SKU CH-T7PQ-5XXTJ

A quad-core desktop with 8 GB DDR3, 256 GB SSD and 1 TB HDD running Windows 10 Pro

  • Screen sizeNo Screen
  • ProcessorIntel Core i7 2nd Gen
  • Memory size8 GB DDR3 Desktop RAM
  • Storage drive2.5 in 256 GB Solid State + 3.5 in 1 TB Hard Drive
  • GraphicsIntel HD Graphics 2000
  • ChipsetIntel Q67

Memory Capacity 8GB DDR3

  • Quad-core Intel i7-2600 at 3.40 GHz handles multi-tasking smoothly
  • 256 GB SSD plus 1 TB hard drive gives fast boot and large storage
  • 8 GB DDR3 memory supports everyday workloads
  • Windows 10 Pro 64-bit pre-installed with Certificate of Authenticity
  • DVD±RW drive and Gigabit Ethernet for discs and wired networking

Dell OptiPlex 790 Mini Tower

This Dell OptiPlex 790 Mini Tower desktop computer is built for home office and student workloads. It ships new with an Intel 2nd Gen i7-2600 quad-core processor running at 3.40 GHz, 8 GB of DDR3 memory and a dual-drive layout of a 256 GB SSD plus a 1 TB hard drive. Windows 10 Pro 64-bit is pre-installed with a Certificate of Authenticity. A USB keyboard and mouse are included in the box.

265 W power supply and thermals

The system draws power from a 265 W supply while the integrated Intel HD Graphics 2000 and DDR3 memory keep heat output modest during typical office tasks. A DVD±RW drive and Gigabit Ethernet port add no meaningful thermal load. The USB wireless dongle and integrated sound card operate within the same low-power envelope, so fan noise stays unobtrusive for everyday use.

Sustained load behaviour

Under continuous multi-threaded work the i7-2600 can reach 3.90 GHz turbo speeds across its four cores and eight threads, but the 265 W unit limits how long peak frequency holds before throttling. The 8 GB DDR3 ceiling and mechanical hard drive may become bottlenecks for prolonged heavy workloads. Buyers who need more memory headroom or a second graphics card should look elsewhere.

How it compares

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

Price $233.99
Cheaper than about 83% of the 14,711 comparable items (median $494.99).
Memory size 8 GB DDR3 Desktop RAM
Lower than about 80% of the 5,840 comparable items (median 16 GB).
RAM capacity 8 GB DDR3
Lower than about 80% of the 13,125 comparable items (median 16 GB).

Specifications

Product
Brand nameDELL
Product lineOptiPlex
Model name790
Part number790/990
Product typeStudent / Home Office
Recommended useConsumer
Product colorBlack/Silver
Processor
ProcessorIntel Core i7 2nd Gen
CPUIntel 2nd Gen i7-2600
CPU model3.4 GHz
CPU socketLGA 1155
ChipsetIntel Q67
Memory
Memory size8 GB DDR3 Desktop RAM
RAM capacity8 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 in 256 GB Solid State + 3.5 in 1 TB Hard Drive
SSD storage256 GB
Hard drive1 TB
Storage configuration2.5 in 256 GB Solid State + 3.5 in 1 TB Hard Drive
Disc driveDVD±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
Wireless adapterUSB Dongle
Ethernet controllerIntegrated
Bluetooth supportYes
Ports & slots
Front USB ports4
Front audio jacks1x Headphone, 1x Microphone, 1x Line In
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
ChassisMini Tower
Overall dimensions24 × 22 × 12
Product weight24 lb (10.9 kg)
In the box
Bundled mouseUSB Mouse
Pointing deviceUSB Mouse
In the boxUSB Keyboard/Mouse and Power Cord
Software
Operating systemWindows 10 Pro
Pre-installed softwareWindows 10 Installed
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 add more DDR3 memory to the OptiPlex 790 Mini Tower and which slot mistake should I avoid?

Open the case, locate the four 240-pin DIMM slots and insert modules until the retention clips click; the common error is leaving a gap between modules instead of populating matched-channel pairs first.

Which drive will likely need replacement first, the 256 GB SSD or the 1 TB hard drive?

The 3.5-inch 1 TB mechanical hard drive has moving platters and typically fails before the solid-state drive, so plan to swap it after several years of heavy use.

What power limit caps the CPU and GPU during long workloads?

The 265 W power supply restricts total system draw, so sustained Turbo Boost up to 3.90 GHz and integrated graphics load will throttle once combined demand approaches that ceiling.

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