Noticed that the cooler is showing Cooler Master logo . Shouldn't it be showing Intel logo if it's stock cooler ?
Don't know about that . But I have a small fan on the cabinet also ( Chassis fan ? ) .
Another case of bad chassis. You should think about changing the chassis.
My suggestion would be:
NZXT Source 210 @2.4K
if you need to get a cooler consider getting CM Hyper TX3 priced arund ~1.3k.