How many fans for Phanteks Enthoo Pro II Tempered Glass

[aircoolingfans]

Thinking to buy a Phanteks Pro II (http://www.phanteks.com/Enthoo-Pro2-TemperedGlass.html) and looking for fans.

This case has lots of fan places. Will it be overkill to fill all of them?

Total Fan Mounts = 15 x 120 mm / 8 x 140 mm (+6x +120mm)
Front Fan = 4 x 120 mm / 3 x 140 mm
Top Fan = 3 x 120 mm / 3 x 140 mm
Rear Fan = 1 x 120 mm / 1 x 140 mm
Bottom = 3 x 120 mm / 1 x 140 mm
Side = 4 x 120 mm

In another forum someone suggested that "top front fans pull the fresh air out of the system from the front fans before the components uses the air. It a waste of money spent"

3x front
1x top rear
1x rear

So he suggest 1 fan on top instead 3 fans.

Will more fans help cooling? If yes then i can populate all spots with fans. But I've heard they have diminishing returns or hurt temperature negatively.

What do you thing?

 

[Begbie]

I've got my top front fan on push, probably useless but it was sat about doing nothing. Doesn't affect it, and most of the time it doesn't spin anyway (due to fan curves).

 

[PC777]

Front top fan as exhaust not always a waste.

I have a 5.25 drivebay and the top front 140mm fan is partly obscured by the drivebay, but I've also got a 2TB SSD in the top bay getting nicely cooled by that half of the 140mm exhaust, the other half that isn't covered by the drivebay only channels air that's already been pushed towards the CPU and GPU by the drivebay keeping cool air lower from the front intake 2x 140mm until it's needed.

Tested it many times, hot air still comes out of the front 140mm fan that is partly obscured by, and also cooling the drivebay, but still way less than the rear top 140mm for exhaust. So clearly not as efficient as rear top exhaust, but in my set up the front top exhaust does still do its job.