Looking for input on fan placement for my Define R5

[azrael]

So I'm *finally* ready to build/upgrade my current PC during my Easter vacation. I'd like to get some input on how I envision the fan placement. Case is the Fractal Design Define R5. Fans available are 2x Fractal Design Dynamic GP-14, 2x Arctic P14 PWM CO and 2x Corsair LX140. All fans are 140 mm ones.

Originally, I wanted to use the P14s as intake fans, but I've now bought the 2-fan LX140 starter pack because of their static pressure. Seems like static pressure is more import than airflow in my case scenario. These fans will be mounted the "red" position.

This leaves the GP-14s and the P14s. Right now, I'm thinking of putting one P14 at the "yellow" position as an extra intake fan and the other P14 at the "green" position as exhaust fan. Alternatively, the GP-14s at the same positions.

Am I bonkers? (rhetorical question btw, as I most assuredly am )

 

[QuietBob]

Taking a pantyhose from the prettier one of the household for improved filter use works as well

Might as well, though I prefer the path of least resistance

 

[Shrek]

Dust is, unfortunately, worse the lower your airlow is.

Dust sticks to stuff with a very weak electrostatic force, so slower airflow, slower spinning fans, and quieter systems will - on average - gather more dust than aggressive, high-rpm fans and cases with stronger airflow that can overcome the weak electrostatic forces binding dust particles to the insides of your PC.

But what of the argument that dust will fall out of still air?

 

[Chrispy_]

But what of the argument that dust will fall out of still air?

Not relevant to active airflow, I don't think.

Yes dust is heavier than air, but its terminal velocity is so low that even weak convection currents move it around. When your PC is off, there's a risk some dust will fall into the case through any exposed top vents, but again, that's not really a concern as an order of magnitude more dust gets through and around the intake filters of a case. By the time you'd be concerned about any dust that had fallen in, your case would have been long overdue a clean out of all the dust it had actively sucked in.