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Black and silver small form factor desktop tower with DVD-RW slot and front ports

DELL

DELL OptiPlex 790 SFF desktop PC i5 4 GB 128 GB SSD Windows 10 Pro

SKU CH-FK7D-7VXK8

Small-form-factor desktop with a quad-core Intel i5, 4 GB DDR3 memory and a 128 GB SSD for everyday office tasks

  • TypeStudent / Home Office
  • Form FactorDIMM 240-pin
  • UsageConsumer
  • ColorBlack/Silver
  • ProcessorIntel Quad-Core i5 (2.9GHz-3.30GHz)
  • Processor Main Features64 bit Quad-Core Processor
  • Quad-core Intel i5 handles multitasking at up to 3.30 GHz
  • 128 GB 2.5" SSD boots Windows 10 Pro in seconds
  • 4 GB DDR3 RAM supports everyday productivity
  • Gigabit Ethernet provides fast wired network access
  • DVD-RW drive reads and writes discs for legacy media

Compact desktop for everyday tasks

The Dell OptiPlex 790 SFF is a small-form-factor PC built around a quad-core Intel i5 running at 2.9 GHz to 3.30 GHz. It ships with 4 GB of DDR3 memory and a 128 GB 2.5-inch SSD. Windows 10 Pro 64-bit is pre-installed and activated, so the system is ready for office applications, web browsing and light multitasking straight out of the box.

Thermals and power in daily use

The SFF chassis uses the stock Intel cooler and a single rear exhaust fan to move air across the Q65 Express chipset and integrated Intel HD Graphics 2000. Under typical office loads the processor stays within its rated turbo range of 2.90 GHz to 3.10 GHz without audible fan ramping. Power draw remains modest because the platform lacks a discrete graphics card and the SSD eliminates mechanical drive spin-up.

Included peripherals and expandability

A USB keyboard and USB mouse are bundled, removing the need for separate input purchases. The DVD-RW drive reads and writes CDs and DVDs for legacy media or software installation. Integrated Gigabit Ethernet provides wired networking, while Wi-Fi and Bluetooth are also present. Two DIMM slots support up to 16 GB of DDR3 if more memory is required later.

Highlights

  • Quad-core Intel i5 handles multitasking at up to 3.30 GHz
  • 128 GB 2.5" SSD boots Windows 10 Pro in seconds
  • 4 GB DDR3 RAM supports everyday productivity
  • Gigabit Ethernet provides fast wired network access
  • DVD-RW drive reads and writes discs for legacy media

Specifications

BrandDELL
SeriesOptiPlex
Model790
Part Number790
TypeStudent / Home Office
Form FactorDIMM 240-pin
UsageConsumer
ColorBlack/Silver
ProcessorIntel Quad-Core i5 (2.9GHz-3.30GHz)
Processor Main Features64 bit Quad-Core Processor
Memory4 GB DDR3 Desktop RAM
Storage128 GB 2.5" Solid State Hard Drive ( SSD)
GraphicsIntel HD Graphics 2000
AudioSound card - Integrated
EthernetGigabit Ethernet
MonitorMonitor not included
CaseSmall Form Factor (SFF)
KeyboardUSB
MouseUSB
Operating SystemWindows 10 Pro
Software IncludedWindows 10 Pro Restore Media
ChipsetIntel Q65
CPU TypeIntel Core i5 2nd Gen
Max Supported Qty1
CPU Main Features64 bit Quad-Core Processor
GPU/VGA TypeIntel HD Graphics 2000
Graphics InterfaceIntegrated video
Memory Capacity4GB DDR3
Memory SpeedDDR3
Memory Spec1 GB x 4
Memory Slot (Total)4
Memory Slot (Available)0
Memory Slots (Available/Total)0/4
Maximum Memory Supported16 GB
HDDNo
HDD InterfaceSATA
Optical Drive TypeDVD±RW
Screen SizeNo Screen
Audio ChipsetIntegrated
LAN ChipsetIntegrated
LAN Speed10/100/1000Mbps
WLAN802.11a/b/g/n Wireless LAN
Front USB4
Front Audio Ports2
Video Ports1 VGA, 2 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)11.4 x 3.7 x 12.3
Weight14Lbs

Questions about this item

How do I install DDR3 memory in the 240-pin DIMM slots, and which step is often missed?

Power off, open the SFF case, align the notch on each DDR3 module with the 240-pin slot, press firmly until both side clips click, then verify 4 GB or up to 16 GB shows in BIOS.

Which component will likely need replacement first during long-term use?

The 2.5-inch 128 GB SSD has a finite write endurance; plan to replace it if capacity fills or SMART warnings appear after heavy workloads.

What thermal or power limit appears first when the Intel Quad-Core i5 runs at 3.30 GHz under sustained load?

The small-form-factor chassis and 240-watt power supply restrict continuous turbo, so the CPU throttles to stay within the cooling and power envelope.

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