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HP 8653 Motherboard — Overview, Features, and Repair Guide

Summary

The HP 8653 motherboard is a desktop-class mainboard used in certain HP Pavilion and Compaq Presario models from the mid-2000s. It supports Intel Pentium 4 and compatible LGA/Socket processors of that era, DDR or DDR2 memory depending on sub-variant, integrated chipset components, and common I/O for consumer desktops. This guide covers typical specs, common issues, diagnostics, upgrades, and repair tips.

The biggest hurdle for "Rother" owners is its proprietary nature. Unlike standard ATX boards, HP uses a non-standard power connector—an 8-pin and a 4-pin setup rather than the universal 24-pin. This makes upgrading your Power Supply Unit (PSU) a challenge. If you're eyeing a beefy new GPU, you may need to source a specific HP-branded 500W PSU (like the L05757-800) or use specialized adapters. hp 8653 motherboard

  • One AGP 8x slot
  • Five PCI slots

The i865 chipset also lacked PCI Express—a fatal limitation by 2005, when NVIDIA and ATI moved their GPUs to PCIe. HP discontinued 865-based models in early 2005, replacing them with 915G/925X boards (LGA775, PCIe, DDR2). HP 8653 Motherboard — Overview, Features, and Repair

  • CPU support: Socket 478, Intel Pentium 4 (Northwood and Prescott) up to 3.4 GHz, plus Celeron. Some late revisions supported Pentium 4 Extreme Edition.
  • Chipset: Intel 865PE (Performance Edition) or 865G (with integrated Intel Extreme Graphics 2). The 865G model featured an AGP 8x slot and optional onboard VGA.
  • Memory: 4 × DIMM slots, dual-channel DDR-400 (PC3200), up to 4 GB (though 32-bit Windows limited usable RAM).
  • Expansion slots: 1 × AGP 8x, 5 × PCI (32-bit/33 MHz), no PCIe (still years away).
  • Storage: 2 × Parallel ATA (Ultra DMA 100), 2 × Serial ATA (SATA 1.5 Gb/s), floppy.
  • Audio: Integrated Realtek ALC650/655 6-channel AC’97 or, on higher-end, SoundMAX Cadenza.
  • Networking: Broadcom or Realtek 10/100 Ethernet; some had Intel PRO/100.
  • Rear I/O: PS/2 keyboard/mouse, 4× USB 2.0, parallel, serial, VGA (on 865G), audio jacks, RJ-45, game/MIDI port (rare by 2004).

HP 8653 motherboard , often referred by its internal HP name One AGP 8x slot Five PCI slots

Specifications

Storage: Typically includes three SATA data headers and one M.2 slot for SSDs.

Where to Find an HP 8653 Motherboard in 2025

Because HP discontinued this board around 2002, new old stock (NOS) is virtually extinct. Your options include: