Thank you for your replies. My case is not very expensive, but is not extremely low end either. I paid $275 USD for it with PSU. It seems to be very high quality.
As for the case dimensions, motherboard dimensions, or motherboard installation having problems, I do not think that this is the case. I have a PCI card installed for wireless internet and it is lined up perfectly. As you know, a PCI card plug, like PCIe, is not only one section. Mine is divided into two, and this lines up perfectly with the PCI slot that is also of two sections. The gap between sections is very small, and the card and slot plug in easily without any forcing. The same is true for the metal plate that inserts between the motherboard and the end of the case.
I do not think that there is a problem with your actual card, but is it possible that the screw holes on the metal plate could have between mistakenly offset?
Provided that I use high quality tape that is double sided in order to connect the plate and the card, so long as it holds well so that tight contact is kept between the parts, do you agree that the card as a whole will be as stable as if the screws were in use? As the card will be in the slot, the metal plate will be pushed into its place, and the plate will also be screwed on to the case, I do think that it will be fine. It is too much of a hassle for me to order a new case that may have the same problem, wait for it to arrive, and transfer all of my computer components. I was hoping to start my project last week and would like to have all of my gear up and running by the weekend.
As long as this does not void my warranty, I will proceed. If taping were hypothetically my only solution, would you recommend:
a. Double-sided tape as I specified
b. Taping over the screw hole, around the top of the card, and onto the other side of the screw hole
c. Both
d. Glue gun? (hopefully not)
e. Another method of attachment
By choosing an option, I will in no way interpret it as admitting to a product defect.
Thank you again for your assistance. I am greatly anticipating the low latency.