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Black and silver Dell OptiPlex 790 mini tower desktop with keyboard and mouse

DELL

DELL OptiPlex 790 Mini Tower i5-2400 3.10GHz 4GB DDR3 1TB desktop PC

SKU CH-Q6DQ-RDK1X

A compact mini-tower desktop with a quad-core i5-2400 processor, 4 GB DDR3 memory, 1 TB SATA storage, DVD±RW drive and Windows 10 Pro pre-installed

  • Screen sizeNo Screen
  • ProcessorIntel Core i5 2nd Gen
  • Memory size4 GB DDR3 Desktop RAM
  • Storage drive1000 GB (1 TB) 3.5 in SATA Hard Drive
  • GraphicsIntel HD Graphics 2000
  • ChipsetIntel Q67

Memory Capacity 4GB DDR3

  • Quad-core i5-2400 at 3.10 GHz handles everyday tasks
  • 4 GB DDR3 memory supports smooth multitasking
  • 1 TB SATA hard drive stores large file collections
  • DVD±RW drive reads and writes optical media
  • Windows 10 Pro 64-bit installed with keyboard and mouse included

OptiPlex 790 Mini Tower Desktop

The Dell OptiPlex 790 is a mini-tower desktop built around an Intel Core i5-2400 quad-core processor running at 3.10GHz with a turbo frequency of 3.40GHz. It ships with 4GB of DDR3 memory and a 1TB 3.5-inch SATA hard drive. Windows 10 Pro 64-bit is pre-installed, and a USB keyboard and mouse are included.

Home office users and students seeking

This configuration suits buyers who need a complete Windows 10 Pro workstation for everyday productivity, web browsing and light multitasking out of the box. The integrated Intel HD Graphics 2000 and 4GB of RAM limit its suitability for modern gaming, video editing or heavy multitasking workloads. Buyers who need more memory capacity, discrete graphics performance or faster storage should look at other options.

4GB DDR3 memory configuration

The system arrives with 4GB of DDR3 RAM installed in a DIMM 240-pin form factor. Manufacturer highlights indicate the platform supports upgrades to 8GB or 16GB of DDR3, so the installed amount is the key specification that determines whether the machine meets immediate workload demands or requires additional modules before deployment.

How it compares

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

Price $214.99
Cheaper than about 87% of the 14,711 comparable items (median $494.99).
Memory size 4 GB DDR3 Desktop RAM
Lower than about 97% of the 5,840 comparable items (median 16 GB).
RAM capacity 4 GB DDR3
Lower than about 95% of the 13,125 comparable items (median 16 GB).

Specifications

Product
Brand nameDELL
Product lineOptiPlex
Model name790
Part number790/990 Series
Product typeStudent / Home Office
Recommended useConsumer
Product colorBlack/Silver
Processor
ProcessorIntel Core i5 2nd Gen
CPUIntel Quad-Core i5 (2.9 GHz-3.3 GHz)
ChipsetIntel Q67
Memory
Memory size4 GB DDR3 Desktop RAM
RAM capacity4 GB DDR3
RAM type and speedDDR3
Memory configuration1 GB x 4
Total memory slots4
Free memory slots0
Memory slots0/4
Max supported RAM16 GB
Storage
Storage drive1000 GB (1 TB) 3.5 in SATA Hard Drive
SSD storageNo
Hard drive1 TB
Disc driveDVD±RW Drive
Drive interfaceSATA
Optical driveDVD±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 adapterWiFi USB Adapter
Ethernet controllerIntegrated
Wi-Fi802.11 Wireless LAN
Ports & slots
Front USB ports4
Front audio jacks2
Video connectors1 VGA, 1 Display Port
Rear USB ports6
Ethernet port1x Headphone, 1x Microphone, 1x Line In
Size & build
Form factorDIMM 240-pin
ChassisMini Tower
Overall dimensions11.4 × 3.7 × 12.3
In the box
Bundled mouseUSB
Pointing deviceUSB Mouse
Software
Operating systemWindows 10 Pro
Pre-installed softwareWindows 10 Pro Restore Media
More details
KeyboardUSB
Rear IEEE 13941 port
Keyboard typeUSB Keyboard

Other versions of this model

5 more in the same range

Questions about this item

How far can the Intel i5-2400 turbo boost reach before thermal throttling becomes the limiting factor?

The processor can turbo up to 3.40 GHz, but sustained all-core loads will likely hold lower clocks once the Mini Tower cooler saturates.

What are the typical noise and heat levels when the system runs continuously under load?

The stock cooler in the Mini Tower chassis spins up audibly under sustained load; expect noticeable fan noise and warm exhaust air from the rear vent.

Which DDR3 memory modules must I already have to expand the RAM beyond the installed 4 GB?

You need unbuffered non-ECC DDR3 DIMMs (240-pin) to fill the remaining slots up to the 16 GB maximum supported by the board.

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