Fill a case with Silent 120mm and 140mm Fans

X Hatch

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Jun 20, 2014
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Hey guys, I'm asking yet another question on my build which I am pulling together and this time I need some help with fans. Now I know that fans are just a fan, but I'd like to give my PC the best performance as possible, or at least keep it as quiet as possible.
Since specs will give an idea of what I'd be cooling:
Case: Corsair Vengeance C70 (11 fan mount locations!!!)
CPU: Intel i7 4790K (It will be over clocked)
GPU: Asus Nvidia GTX 780ti
Motherboard: Asus Maximus VII Hero
PSU: Corsair RM 750Watts
RAM: Corsair Vengeance 16GB 2400Mhz
Liquid Cooler: NZXT X61 Kraken 280mm

Okay so since I am subtracting two fan mount locations due to my cooler, and another three due to preexisting fans, I only have 6 slots to fill. I need 2x 120mm fans, and 4x140mm fans. So could I get a hand finding either the cheapest solution, the most noise efficient solution, or the most colourful LED solution.

THANKS
 
Solution
2 fan options -

BeQuiet SilentWings 2 120 / 140mm

Noctua NF-A12 120mm / NF-A14 140mm

Both give excellent air flow and near silent operation.