I can't Imagine they have to write it from scratch. Because the 3x0 and the 4x0 Chipset are very similar. Only the 5x0 Chipset Supports PCIx 4.0 and some of the Controllers are different on the Mainbaords. Like the NIC or Soundchip or an extra Chip for I/O.
But maybe pega1 or Bigfoot could shed some light on this topic.

[ Editiert durch ThePlayer 01.08.2020 - 00:12 ]