Towering silence

In some cases, a good quality single tower cooler can handle a 65W processor passively (and make some seriously cool looking PC).

Source: Overclock.net

Editor's note: Natural convection is optimal with fins placed vertically. When the motherboard is mounted horizontally, a C-type cooler is the way to go. You can also check out 10 coolers to use without a fan for our recommended brands.