Garzi :
How many of these Cooler Master Hyper 212 Plus - CPU Cooler with 4 Direct Contact Heat Pipes (RR-B10-212P-G1) will fit into the following case?
Cooler Master HAF 912 Mid Tower Computer Case with High Airflow RC-912-KKN1-AMZ
Unless you have more than one CPU, only one.
That is a fan to cool the CPU, not a general case fan.