x86 cpus' Guide - View details on Intel Pentium 4 1,8GHz Socket 423
Pentium 4 - Wikipedia
Intel Desktop Pentium 4 Willamette microprocessor family
Intel Pentium 4 1.5 GHz (socket 423) - Hardware museum
Amazon.com: Upgradeware P478 Socket 423 to 478 Upgrade Adapter Converter Like Powerleap PL-P4/N PL-P4N : Electronics
Intel Pentium 4 1.3 GHz (socket 423) - Hardware museum
New MSI 845 Pro ver: 1 MS-6529 socket 423 ATX PC motherboard main system board - NOS S423 Pentium 4 P4 Willamette AGP 4x PCI USB - Classic Computer Shop
Pentium 4 used TIM, not solder | TechPowerUp Forums