Computer making a small vibrating noise

[dlf]

Built http://pcpartpicker.com/p/P5kr (except for 8 GB of RAM, not using that monitor, and using the stock CPU heatsink) it seems in the last day or two the left side of the case has started to make a small vibrating noise. Anyone have ideas on what's making the noise?

Should also add that the system is on bamboo floor in Dallas, oh and I have gotten like 2 or 3 random BSOD.

[sc302 Veteran]

It is going to be a fan or a cable touching metal that is picking up the fan vibrations.....look around and listen to where the noise is coming from when you pull off the cover.

[ShareShiz]

Most likely a fan issue. Pray to god it's not a HDD issue. :|

[Lingwo]

Take the side off, if it is still making a noise, put your hand on different things like the fans and see if that stops it. When you find what is causing the noise. See why it is making the noise. Might be as simple a cable vibrating against the side of the case.

[dlf]

I did take the side off and it seems unplugged the fan (header) from the motherboard but the sound isn't being made anymore. So it seems like it's my side fan that was making the noise.

[Arachno 1D]

Probably harmonics from the oscillation of the fan causing the casing to vibrate in sympathy.