The Intel D865GLC and D865PESO are Socket 478 ATX motherboards engineered for Intel Pentium 4 and Celeron processors. The D865GLC pairs Intel’s 865G Graphics and Memory Controller Hub with the 82801EB I/O Controller Hub, delivering integrated Intel Extreme Graphics 2. The D865PESO uses the 865PE (Springdale-PE) chipset for enhanced performance. Both boards support Pentium 4 processors across Northwood, Prescott, Willamette, and Gallatin codenames with FSB frequencies of 400 MHz, 533 MHz, and 800 MHz, as well as Celeron variants at 400 MHz FSB. Process nodes span 0.09 to 0.18 micron with thermal design power ranging from 46.8 to 103 W.
## Technical Specifications
**Chipset & CPU Support**
• D865GLC: Intel 865G GMCH + Intel 82801EB ICH5
• D865PESO: Intel 865PE (Springdale-PE)
• Socket: 478 (mPGA478)
• Supported FSB: 400 MHz, 533 MHz, 800 MHz
• Process Technology: 0.09, 0.13, 0.18 micron
• TDP: 46.8–103 W
**Memory**
• Four 184-pin DDR SDRAM DIMM sockets
• DDR 400, DDR 333, DDR 266 support
• Memory voltage: 2.5 V
• Dual-channel capable; non-ECC unbuffered modules
• Maximum capacity: 4 GB
**Storage & Expansion**
• Two IDE connectors (Primary, Secondary)
• Two SATA I interfaces
• One AGP 3.0 slot (0.8 V / 1.5 V universal)
• Multiple 32-bit PCI slots
**Integrated Peripherals**
• Audio: Analog Devices AD1985 (SoundMAX AC97)
• Networking: RJ-45 LAN
• USB: Eight USB 2.0 ports
• Legacy: Parallel, Serial, PS/2 keyboard and mouse ports
## Key Features
• D865GLC integrates Intel Extreme Graphics 2 for graphics-capable systems without discrete GPUs
• Dual-channel DDR memory architecture maximizes bandwidth for Pentium 4 workloads
• Legacy I/O support includes diskette connector, parallel, and serial ports for backward compatibility
• Chassis intrusion detection and CMOS battery management
• BIOS RC86510A.86A with SMBIOS, legacy USB support, and security passphrase options
## Typical Applications
These boards suit business desktops, technical workstations, and general-purpose computing environments where Pentium 4 or Celeron processors meet application requirements.
## Compatibility & Integration
Both boards accept unbuffered, non-registered DDR DIMMs with Serial Presence Detect. The AGP 3.0 slot accommodates discrete graphics cards. CD audio, auxiliary line-in, and power distribution headers support modular system builds. ATAPI CD-in connector enables direct audio routing from optical drives.
