Ultra-rare unreleased Pentium 4 with 4.0 GHz clock speed discovered — CPU-Z confirms it is an Intel Pentium Extreme Edition 980

https://www.tomshardware.com/pc-components/cpus/ultra-rare-unreleased-pentium-4-with-4-0-ghz-clock-speed-discovered-cpu-z-confirms-it-is-an-intel-pentium-extreme-edition-980