Can I be 100% certain that a PCIe x4 card will fit in a PCIe x16 slot?

Lenovo GeForce GT 730 2 GB GDDR5 PCIe x16 Low Profile Video Card Pre-Owned: Lenovo

You can insert a PCIe x1 card into a PCIe x16 slot, but that card will receive less bandwidth Similarly, you can insert a PCIe x8 card into a

pcie slot bracket В PCI Express x16 можно вставить видеокарту, а в PCI Express x1 — совместимую плату расширения Например, звуковую карту, тюнер, карту

pcie slot qrelease Both the blue slots are PCIe x16 The difference is that the 2nd PCIe 16x is capable of wiring