Looks like some sort of additional bracket clamping it in, without being able to see the other side, you need to remove that whole bracket from the other side
Looks like some sort of additional bracket clamping it in, without being able to see the other side, you need to remove that whole bracket from the other side
Should be a little flap thing sticking out the back. It is a retention bracket that goes over all the slots I would suspect. Most I have seen have a single screw and that whole piece will rotate towards the motherboard to release the expansion cards.