First, let’s define what a case fan really is. The computer fans that are installed inside or outside of a PC/computer’s case are called “case fans”. These fans are not like CPU coolers.
Because CPU coolers blow out hot air, CPU coolers blow it out. Case fans draw in cool air from the outside and blow out hot air inside. It’s quite simple, right?
Short Answer: Differences between 120mm and 140mm Fans
If the build quality, PC quality and temperature are maintained constant, then the 120mm fan will be no different from the 140mm fan. Only the dimensions/sizes of the fan can vary. 140mm fan will perform better with larger dimensions. However, the constraints must be kept constant.
If the 140mm fan’s quality is good and the 120mm fan is better, which one will be more efficient? Due to its superior quality and RPM’s, the 120mm will always perform more.
120mm vs 140mm Fan Cooling
CFM and RPM are two of the most common specifications for case fans. RPM stands for revolutions per minute. It refers to how fast a fan turns in its origin within a minute. CFM stands for cubic feet per minute. It refers to how much air can be circulated through a fan in a minute.
We can generally say that 140mm case fans are more efficient and perform better than 120mm fans. However, other factors/contraints such as quality, build, design or computer case must remain constant.
120mm vs 140mm Static Pressure
Static pressure can be described as the amount CFM/airflow that will reach the heatsink or overall PC case. The CFM affects static pressure. Both the 120mm diameter and the 140mm widths vary. The 120mm fan will have a higher airflow/CFM than the 140mm. The 140mm fan is generally better.
Thermaltake Ring CLF039 is an excellent choice if you are looking for a reliable static pressure fan. It’s both affordable and powerful. We also have a list of the top Best 140mm case fans.
120mm vs 140mm — Performance, Noise & Value
Here are some other factors to be aware of:
Performance: Due to its larger blades, 140mm fans have a higher CFM/airflow and RPM. If the constraints are not changed, 140mm fans perform better than 120mm fans.
Noise: 140mm produces less noise than 120mm, but has a higher performance.
Value: The 140mm fans are more expensive than the 120mm fans in terms of price to value, but they will perform and be quieter than the 120mm fans. It is always better to have multiple 140mm fans or larger than 120mm fans, which takes up more space and will consume more power.
CONCLUSION
It is clear that 140mm case fans outperform other models due to their value, build quality, noise, and performance. However, it is important to keep the temperature, PC case and other factors constant in order to compare both case fans. Keep it simple.
