The cooling mechanism is probably one of the most important and ignored parts in PC buildings. Choosing the right fan is necessary for keeping the optimal temperature inside the hardware. Most computers have a case that can only fit either 140 mm fan or 120 mm fan.
However, in case you have no option but to use a 140 mm fan on a case that was meant to be used for 120 mm, you should not be worried at all. Can you do it? We are going to talk about this matter- how to fit 140 mm fan on 120 mm mount in our next segment.

How to Fit 140 MM Fan on 120 MM Mount?
Yes, you can fit a 140 mm fan on a 120 mm mount with some buts. The case needs to possess enough space for the 140 mm fan. If the case had space for a 3 x 120 mm fan, then it should be able to make room for a 2 x 140 mm fan.
But it would be impossible to fit a 3 x 140 mm fan on a 2 x 120 mm mount. Plus, you do not need 3 fans for any good reason.
One more important thing to remember, the case must have slots for loosening screws so that you can fit the 140 mm fan. You may try to mount it on the backside for further convenience.
Frequently Asked Questions
Should I Use 120 or 140mm Fans?
The 140mm fans have larger blades than 120mm fans. That’s why the 140mm fan is able to push more air than the 120 mm fan while running at the same RPM. From this point of view, you should use 140 mm fans.
Is 2 140mm Fans Better than 3 120mm?
Although 140mm fans can push more air than 120mm fans, 3 120mm fans can provide more airflow than 2 140mm fans. So, the quick answer is, 3 120mm fans are better than 2 140mm fans.
What Is the Screw Spacing for 140mm Pc Fan?
The mount for 140mm fans is 125mm and the screw holes are 7.5mm from the edge of the fan but only when it has a full frame.
Conclusion
The 140 mm fans are great for their low noise and moderate spinning compared to the 120 mm fan. The temperature is maintained nicely with the 2 x 140 mm fan. That’s why many want to use this fan although their PC (Personal Computer) does not have a 140 mm slot. The good news is you still can fit a 140 mm fan on a 120 mm mount just by sacrificing one fan and that too not going to affect anything on the cooling system.
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