While Noctua has a compatibility list of PC cases for the NH-P1, we recommend going open-air if possible. Thermaltake's
Core P1 (pictured)
Core P3 and
Core P5 are simply unbeatable when it comes to convection. Other solutions include test benches like the
Streacom BC1 or
BC1 Mini. It's also a great way to enjoy the eery beauty of a totally silent computer.