PCIe NVMe SSDs

PCIe NVMe SSDs pcie 4 in pcie 3 slot ssd It should be backward compatible, but you will see less performance than if you had it in a PCIe slot since it runs at PCIe x8 instead pcie 40 in pcie 30 slot Does anyone know if you can buy a PCIe x16 low profile card that supports FOUR M2 NVMe drives? I found this Supermicro card which

pcie 40 in pcie 30 slot PCI-E SSDs represent a significant leap in storage technology, offering enhanced speed and performance over previous PCI-E SSDs

pciex16 slot From a numbers standpoint, it depends on the speed of your gen4 drive; but if your drive is capable of higher transfer speeds than gen3 A PCIe SSD card can be inserted into a motherboard having PCIe slots, but the SSD will not be able to make use of the greater bandwidth