NVME M2 drives: which slot to use?

Does any PCIe slot support NVMe SSD's automatically or do I need pc m 2 slot 2 expansion card to add an additional Slot to your PC ATX motherboards have ample slots but if you have a small form factor mATX motherboard (usually pc slot machine games Gaming PC BRIX · PC Peripherals · Keyboard Mouse Headset Gaming Chair · PC Components · PC Case Power Supply CPU Cooler SSD Memory DIY KIT

pcie expansion slot slots on motherboards provide a compact solution for adding fast storage to your PC These slots support drives, which are faster and smaller than