[universa1]

Not sure if the Mainboard Chipsets initially released with the Pentium iv supported the later released core2 quads... Which is actually the case for the am4, where even the cheapest, oldest Chipset (a320) can support the newest am4 CPU, as long as the MB maker provides a bios update.

[FirmwareBurner]

Sure, but the technological leaps from Pentium 4 to Core 2 Duo and then to Quad that Intel made in those days over 15 years ago, were massive enough to justify the limitation of the same chipset from the Pentium 4 era not supporting the later multi-core Core CPUs, compared to the Ryzen 2-3-4 jumps that AMD made in a similar timeframe which aren't as radically different to each other.