Overview
The Dell E139765 motherboard is a micro-ATX form factor system board designed for Dell Optiplex 740 desktop computers. This used unit has been tested and is suitable for repair, replacement, or system restoration projects where a direct OEM drop-in board is required.
Key Features
- Intel Q45 chipset with ICH10 southbridge for reliable connectivity and performance
- LGA775 socket supports Intel Pentium, Core 2 Duo, and Core 2 Quad processors
- Four DDR2 DIMM slots for memory expansion up to maximum supported capacity
- Integrated network (Broadcom chipset) and audio capabilities
- Micro-ATX form factor fits standard Optiplex 740 chassis
- Multiple USB ports and front panel connectors for peripheral integration
Technical Specifications
- Chipset: Intel Q45 / ICH10
- Socket Type: LGA775 (mPGA775B)
- Memory Support: 4x DDR2 DIMM slots
- Processor Support: Intel Pentium, Core 2 Duo, Core 2 Quad
- Form Factor: Micro-ATX
- Integrated Audio: Yes, onboard audio codec
- Network Interface: 10/100 Mbps integrated LAN
- USB Ports: Multiple rear panel USB 2.0 connectors
- BIOS: Firmware updates available via Dell support
- Voltage Regulation: Multi-phase power delivery
Typical Applications
- Optiplex 740 desktop system repairs and replacements
- Legacy computer restoration projects
- Educational and training lab upgrades
- Small business desktop system maintenance
- IT recycling and refurbishment operations
Compatibility & Replacements
Compatible With
- Dell Optiplex 740 desktop systems
- Intel Core 2 Duo processors (LGA775)
- Intel Core 2 Quad processors (LGA775)
- DDR2 SDRAM memory modules
- Micro-ATX case form factor
- Standard ATX power supplies (20+4 pin connector)
Replaces / Drop-In Replacement For
- Dell Optiplex 740 original motherboard E139765
- Dell Part Number E139765
- Bluford revision Dell system boards for Optiplex 740
Works With
- Windows XP, Windows Vista, Windows 7 operating systems
- Linux distributions with LGA775/Q45 support
- Standard BIOS/UEFI firmware
- Dell Optiplex 740 chassis and power supply specifications
- OEM Dell drivers and firmware updates from Dell support portal
