Pcie X16 -

Maybe you have a hair or something else blocking a contact in your PCIe slot Or a bent socket pin Or a defective motherboard Or a defective

Yes, you can It will not occupy all lanes, but it will function PROPERLY That was a very common question when PCI-e was first introduced

pcie 3 slot You'll need to disable Nvidia HD audio, and plug the from the AV40s to your sound card

pcie slot size PCIe boards can fit into slots designed for their lane configuration or higher Plugging a x4 PCIe into a x16 slot is acceptable