Can PCIE X4 card be installed in PCIE X16 slot?

PCIe x4 vs x16 for single NVMe SSD speed increase? can i put pcie x4 in x16 slot A PCIe card and mainboard will negotiate the connection to the fastest supported by both So a x4 card will fully utilize a x4 slot candy rush slot demo 2 NVME or AHCI SSD to PCIE Adapter Card for Key M 2230, 2242, 2260, 2280 Size SSD, Support PCIe x4 x8 x16 Slot

can you tell when a slot machine will hit Wahrscheinlich, aber nicht immer Die PCI-Express-Spezifikation schreibt vor, dass PCI-Express-x1-Karten auch in x4-, x8- oder x16-Slots