Also, I saw on certain ASROCK PCIE16x connectors that they do not have automatic spring-lock for cards, but you have to slide the lock guards manually to lock the card in the connector.
Hi, thanks for your help! This is in fact the case, there is a thing that I slide to lock the card in, but after I insert the card and lock it, it is still very wobbly and if I pull the side of the card (on the left side, away from the slide) I can pull it out easily. I don't know if this is just how it's made or if I didn't put it in correctly.