This blog is hosted at the Nazi bar, and gives advice to not read all the diffs after talking about security for the whole article.

I regret my click.

This is false when it comes to me to PCIe, as mentioned elsewhere in this thread.

Most motherboards have cutouts on one end of the PCIe x1/x4 slots, for exactly this situation. If not, and you want to be adventurous, you can cut the plastic of the slot and it’ll work fine.

If the card is PCIe 3.0 x4, and the slot is PCIe 4.0 x1, the card will run at PCIe 3.0 x1. But it’ll work.