Best Case Fan Configuration

[WaterSheep15]

Ok, so I have a case (Corsair Obsidian 500D RGB SE) that comes with 3 120mm fans, then I have 1 extra identical fan, and I have a Corsair H100i RGB Platinum cpu cooler (w/ 2 120mm fans). I currently have 2 possible configurations (see professionally designed images below). Both of them have the radiator mounted in the top, 3 front fans and 1 rear. Basically I’m trying to figure out whether I should mount the radiator fans as intake or exhaust. I’m torn because I know it would be better for dust if I mounted them as intake, but I feel like there could be some problems associated with a 5 intake/1 exhaust ratio. I’m running a stock R7 3700X and RTX 2080, and I don’t plan on OCing at any point in the near future, so to me dust buildup is a bigger worry than thermals. Any help / suggestions are much appreciated!

 

 

 

 

[Perrin]

config b probably be best

[Fried.Bacon]

There's no really BEST setup. Personally, I would always go of an Intake=Exhaust+1 configuration, So 3 intake(static-pressure) fans for 2 exhaust(airflow optimized) fans. Besides that:

1. I'd add a filter on my intakes intake section as well. Reason why intake is static-pressure and the N+1 thing.

2. PSU airflow pointing out the case (typically at the bottom)

3. CPU fan is of static-pressure type and is positioned parallel to an exhaust fan. 

 

There's no really best setup. Linus and Luke even have the 1-year airflow test: 

 

 

[Guest]

I would do config B, it seems as the first config has too many intakes. 

[LogicalDrm]

Either will work. Since rad is on top, doesn't really matter which way its mounted. As intake it will be bit cooler than as exhaust.