Why do modern motherboards have so few PCIE slots?

PCI Express Image Gallery - Computer pci e slot Steps to determine the PCI Express version is supported by your motherboard pcie slot length PCI is a parallel interface whereas PCIe is a serial interface PCI uses individual buses for each of the devices connected to it instead of a shared one like

pcie 1 slot How to Enable a PCI Express Card Slot · 1 Open the BIOS menu · 2 Select the “Advanced” tab using the leftright arrow keys · 3 Select the “Video