There’s no question that a top priority of every overclocker is keeping those overclocked components in your system as cool as possible. The effectiveness of the cooling methods you use is critical in gaining those extra frames per second. But simply put, you will find it difficult to “cool” anything with warm air. If fresh air is not circulating through your case, the warmer air temperature inside the case will drastically reduce the effectiveness of your existing CPU and Video Card cooling.
The ideal solution is to have as much fresh air circulated through the case as possible, and which better location to bring that air in than right over the critical hot spots in your system, focusing on your peripheral cards and CPU. My 7200 RPM IBM Deskstar Hard Drive does run a little warm but because it is out of the way near the front of the case, it is not as significant of a concern as the main heat producers that are running overclocked. Mainly, my Hollywood Plus DVD card, my TV Tuner card and my Viper V770 Ultra are in need of cooling. And of course I would like my CPU, the main heat bandit of the system, to stay as cool as possible. I am using an Intel Retail Pentium III 500 SL37D.