PCIe Gen 4 vs Gen 3: Do you need to spend extra on SSDs?

Yes, the PCIe cards can indeed be installed in PCIe slots and vis-a-vis as the PCI interface is designed as forward and backwards-compatible However,

PCIE 5 SSD vs Gen 4 Vs Gen 3 VS Sata! Join PC Centric for the load ssd speed and gaming

pcie x16 expansion slot ssds Does such a low profile card exist that supports 4 drives? Click to expand PCI Express Gen 3 Carrier Board for 4 PCIe SSD

pcie slot meaning 2 slots — supporting both PCIe and — that allow you to expand your system with high-performance SSD storage Designed for the latest generation of NVMe