You will need a clear 11.5 inches minimum from the back of the case to the hard drive cage or any other obstruction to install that card. Older cases that measure (on the outside of the case) 18 inches or less deep have trouble with these cards. (nothing that can't be corrected with a good pair of tin snips
Other issues that arise is the width of the card, it covers 2 PCI slots, so you can't have a card installed in that second slot.
And some poorly designed motherboards have the SATA or USB connectors located in the footprint of the card. Look at your motherboard and consider the real estate under that 11.5 inch card.