Most anything new (Z370 or newer for sure...x299 and Z170 as well I think) has 2-3 that are PCI-E unless you’re buying mATX/ITX boards. ATX is the most common mobo form factor by far. They’re not hard to find at all. Largest is E-ATX, and they’re not terribly common. Now, with the 3 boards, (especially with Intel)…
Most anything new (Z370 or newer for sure...x299 and Z170 as well I think) has 2-3 that are PCI-E unless you’re…