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Black and silver OptiPlex 755 small form factor desktop tower

DELL

DELL OptiPlex 755 2.66G 2G 320 W7H desktop PC

SKU CH-4G56-CQ8W0 MPN 755/2.66G/2G/320/W7H

Refurbished business desktop with a 2.66 GHz Core 2 Duo, 2 GB RAM, 320 GB HDD and Windows 10 Home

  • TypeBusiness Desktops & Workstations
  • Form FactorDIMM 240-pin
  • UsageBusiness
  • ColorBlack/Silver
  • ProcessorIntel Core 2 Duo 2.66GHz
  • Processor Main Features64 bit Dual Core Processor
  • Dual-core 2.66 GHz processor handles business tasks
  • 2 GB memory runs Windows 10 Home smoothly
  • 320 GB hard drive stores documents and applications
  • Integrated Intel GMA 3100 graphics drives dual displays
  • Gigabit Ethernet port connects to wired networks fast

OptiPlex 755 business desktop

The DELL OptiPlex 755 is a refurbished small-form-factor desktop aimed at office environments that need a compact, quiet system for everyday productivity. It runs an Intel Core 2 Duo processor at 2.66 GHz with 2 GB of memory and a 320 GB hard drive. Windows 10 Home is pre-installed and a Microsoft Windows 11 Pro upgrade path is noted. The integrated Intel GMA 3100 graphics and Gigabit Ethernet handle typical business workloads.

Who this suits and who it does not

This unit fits buyers who want a ready-to-use Windows 10 PC for document editing, email and legacy line-of-business applications. It is not for users who need discrete graphics performance, modern gaming capability or more than the installed 2 GB of memory without sourcing compatible modules separately. The four DIMM slots are already populated, so any memory increase requires replacing the existing sticks. The 275 W power supply and small chassis also rule out most add-in cards that need supplementary power.

Deciding specification: installed memory

The critical detail is that 2 GB is installed across four occupied 240-pin DIMM slots in a 512 MB × 4 arrangement, leaving zero free slots for simple expansion. If the intended workload runs acceptably in 2 GB this desktop is a match; if more memory is required the buyer must plan a full module replacement rather than an upgrade.

Highlights

  • Dual-core 2.66 GHz processor handles business tasks
  • 2 GB memory runs Windows 10 Home smoothly
  • 320 GB hard drive stores documents and applications
  • Integrated Intel GMA 3100 graphics drives dual displays
  • Gigabit Ethernet port connects to wired networks fast

Specifications

BrandDELL
SeriesOptiPlex
Model755
TypeBusiness Desktops & Workstations
Form FactorDIMM 240-pin
UsageBusiness
ColorBlack/Silver
ProcessorIntel Core 2 Duo 2.66GHz
Processor Main Features64 bit Dual Core Processor
Memory2GB
Storage320GB
Optical DriveCombo
GraphicsIntel GMA 3100
AudioSound card - Integrated
EthernetGigabit Ethernet
Power Supply275 W
MonitorMonitor not included
Operating SystemWindows 10 Home 🙋‍♀️Microsoft Windows 11 Pro Upgrade
‍👉Check ABS/Helix computers with Windows 11
ChipsetIntel Q35 Express
CPU TypeCore 2 Duo
Installed Qty1
Max Supported Qty1
CPU FSB1333 MHz
CPU Name2.66GHz
CPU Base Frequency2.66GHz
L2 Cache Per CPU4 MB
CPU Socket TypeLGA 775
CPU Main Features64 bit Dual Core Processor
GPU/VGA TypeIntel GMA 3100
Graphics Cardintel GMA 3100
Graphics InterfaceIntegrated video
Memory Capacity2GB
Memory Spec512 MB x 4
Memory Slot (Total)4
Memory Slot (Available)0
Memory Slots (Available/Total)0/4
Maximum Memory Supported8 GB
SSDNo
HDD320GB
HDD InterfaceSATA
Optical Drive TypeCombo
Screen SizeNo Screen
Audio ChipsetIntegrated
LAN ChipsetIntegrated
LAN Speed10/100/1000Mbps
Front USB2
Front Audio Ports2
Video Ports1 VGA
Rear USB6
RJ451 port
Rear Audio Ports1x Headphone, 1x Microphone, 1x Line In
Keyboard TypeUSB Keyboard
Mouse TypeUSB Mouse
Package TypeRetail
Shipping weight8.37 kg
Package size489 × 470 × 184 mm

Questions about this item

What form factor and slot type does the memory use?

The system uses 240-pin DIMM modules installed in four slots, all currently occupied by 512 MB sticks.

How is the processor mounted and what is a common installation error?

The Core 2 Duo seats in an LGA 775 socket; a frequent mistake is bending socket pins by forcing the CPU without aligning the notches.

What component will likely need replacement first and what are the limits?

The 275 W power supply is the usual first failure point; the board supports a maximum of one LGA 775 processor.

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