Page "Case modding" Paragraph 10

* Cooling mods: There are many modifications that can fall into this category.

The most common one is simply drilling a mount for a new fan, or removing a restrictive fan grill.

Others include air ducts, water cooling, filtering, sealing openings to make air flow over hot components instead of escaping near where it entered, or even the adding of a tank of pressurized carbon dioxide or liters of mineral oil to the case.

These modifications are often performed by overclockers either looking for better cooling for hot components or noise ( sound ) reduction.

Some fan modifications are merely a show of modding skill or talent and have no functional purpose.