Dust Bunnys
If proof were needed, clean your PC regularly! This is after only 5 months... OK I know I should run my PC with the side case on but then how would I cool it with the 9' desk fan LOL
I normaly clean my PC twice a year, but given this evidence may be the design of the Artic Cooling Freezer 7 is more prone to this type of thing. The fins are very close together after all...