Case silencing foam question

Hi Everyone,

I want to get some silencing foam for my case as it is a bit loud, and i want to have it up on my desk.

So i want to know where the foam would be placed inside of the case (Link below)

So would it be on both sides and the front?

if it's fans making the noise then the foam will have minimal effect. if you think it's vibration of fans or harddrive noises it might help.

My Fractal Define R4 has it on both sides of the case if that helps...