HAF X more noisy than it should be?

[EvilHomer15]

Hallo, I have been playing around with my computer, to find out how to make it as silent as possible.

I have come to a dead end; the case itself.
I use a HAF X, with:

2 fans on top; the forward one blowing air out, the rear top fan blowing air in.
1 on the side, blowing air in.
1 on the front, blowing air in.
1 on the rear end, blowing air out.

Inside I have a Noctua D14, with 2 fans running ~800 RPM.

I run 2-way crossfire using 6950 Dirt3 Edition Graphic Cards, running 17-20% speed during idling (right now). The speeds were set using MSI Afterburner. There is air distance between the cards. I will possibly buy a bigger ASUS CFX Connector, so I can have even more air between the cards.

Anyways - how do you guys reduce the speed of 5 chassis fans, because I think it is the source of the noise.

I would LOVE to have the fans running 450-550 RPM.

 

[Ninja Pants]

How are your fans powered?

You have a few options:
- If powered directly from the PSU they will always run at 100%, you can't change that.
- If powered from the mobo you can use either the BIOS or software to control the fans.
- Get a fan controller.

Also reconsider the orientation of the top rear fan, why is not exhaust? You are disrupting allot of the airflow by having it as an intake.

 

[JackNaylorPE]

One of the reasons I like the Antec 1200 V3 and DF-85 come with fan speed control built into the fans/case. But you can add a fan controller or do it via the BIOS if you have connected the fans to the MoBo instead of Molex connectors.