It's almost certainly that it's more of a hardware limitation than a software one. E.g. x16 connector using only x8 lanes electrically. They use a full width connector to provide stability for a long card, but a bunch of those connector wires don't lead anywhere.The MSI product page for the GeForce RTX™ 4060 Ti GAMING X 8G states "PCI Express® Gen 4 x16 (uses x8)". Does this mean it's a physical x16 bus but is software limited to x8? Couldn't find other explicit confirmations of this.