What is the performance difference between a 9x140 MO-RA3 and a 4x200 MO-RA3

[TheGreySpectre]

The title says most of it. What (if any) is the performance difference between running the version of the watercool mo-ra3 420 radiator that uses 9x140mm fans and the one that uses 4x200mm fans.

The 200m one has the advantage that you save a decent amount on fans.

 

[Blaylock]

There are 2 main differences that I would point out.

1. the MO-RA3 is a larger radiator that will allow a slightly longer time frame between saturations. (Note: It will take a long time to saturate either as they are both monsters)
2. The biggest difference is not in the radiator, but in the fans used to cool them. If we use the Noctua NF-A series for a direct comparison you will see the 140mm version (NF-A14 PWM has nearly double the static pressure at 2.08 mmH20 vs the 200 mm (NF-A20 PWM) at just 1.08mm. For radiator fans where static pressure is king, the 200 mm fans just can't compete. Even if you're building for silence, which the 200's are great at, the 140mm fans can be slowed down via the PWM controller and be just as quiet while still producing better cooling.

Noctua NF-A14 PWM

Noctua NF-A20 PWM