@Bouton Aide
I have used it non stop for the last 2-3 days and it works normally, no problems, so I don't think this directly affects anything, I don't know if I can put a GPU without a problem because I don't know if the mechanism on the back that locks things-in-PCI-slots into place works normally and is not damaged from this "physical problem".
The only weird thing I noticed is this:
When I plug the Power Supply, the PC turns itself ON automatically for 2 seconds and then turns itself OFF again.
When I force Shut Down, by holding the Power Button for 5-6 sec, the PC turns itself ON automatically for 2 seconds and then turns itself OFF again.
I haven't had a Dell Desktop PC before so I don't know if this is normal operation for these types of Desktops.
The side door of the Case is shut and I haven't attempted to open it, because that will ruin my chances to return it (if I want to return it).
Turns on and off normally, I can get into the Desktop, and run programs, no problem.
I don't know if there are any components inside damaged, because I haven't opened it yet. (Their policy: If I open the side door I can't return it)
@Haz123
It has a 6mm hole in the back so I would like to close this gap and prevent anything from getting inside as it was originally designed.
From the picture, you think I would need to buy new metal parts (PCI Blank Slot Covers, Retention Bracket)? Or bending would be enough?