When searching, use multiple variations: "HP 8653 motherboard," "HP 8653 system board," "A1658-66501," or "HP PA-RISC motherboard."

: HP documentation often cites a maximum of 32 GB (2 x 16 GB) of DDR4-2666 RAM.

Even in the 1990s, the 8653 was forward-thinking:

The HP Pavilion 8653 motherboard is based on the Intel P43 chipset, which supports Intel Core 2 Duo and Core 2 Quad processors. The motherboard has a Micro-ATX form factor, measuring 9.6 inches x 9.6 inches (24.4 cm x 24.4 cm).

Features integrated Realtek ALC3601 5.1 channel audio and a Realtek RTL8111HSH Gigabit LAN controller. The Upgrade Path: How Far Can You Go?

While OEM (Original Equipment Manufacturer) boards often get a bad rap for being "locked down," the Rother 8653 has a few surprises up its sleeve for those looking to squeeze every bit of performance out of their system. Under the Hood: The Specs That Matter