What are PCIe x1 Slots Used For?

1 PCIe x16, 1 PCIe x16, 1 PCIe x1; AMD Quad CrossFireX - 1 x PCI Express x1 Slot - Supports AMD Quad CrossFireX™ and CrossFireX

So, to answer your original question, if you're happy to abandon any other PCI devices you currently have, you can choose a motherboard with more PCIe x1 slots;

1 slot Yes, all PCI-E x1 cards will run in a x4, x8 and x16 slot I ran my wireless PCI-E x1 card in the 3rd x16 slot in my Maximus Extreme

16x pcie slot What Are Small PCIe x1 Slots? PCIe x1 Slots are the smallest of the four PCIe slot standards for motherboards! These slots may not always be present on your