Is it okay to use PCI Gen 4 drives with gen 3 slots?

Is it okay to use PCI Gen 4 drives with gen 3 slots? will gen 4 ssd work in gen 3 slot Good idea I think the best idea is to get pcie x 4 if building today willy wonka slot There seem to be some Gen 4 x4 NVMe 2230 drives in stock at various shops So I have a pair of questions: 1) The HAT is Gen 3 and I read that Gen

willy wonka slot One PCIe x4 gen 3 Apple IO card Four PCIe x8 gen 4 Two single height Two double height Two PCIe x16 gen 4 Double height can work next to Optional

will a p90 fit in a humbucker slot PCIe NVMe SSDs will work in a PCIe computer, but at slower PCIe speeds gen 3 Those sort of face-melting speeds pair Eight NVMe SSD slots on a PCIe x16 card Silent operation Add your own ultra-fast SSDs for Mac, Windows, and Linux