"Behold… the Zalman TNN 500AF fanless case and power supply! This is one of the biggest, baddest, most technologically advanced (not to mention expensive) PC enclosures on the planet. The TNN 500AF design is based on Zalman’s Totally No Noise concept (TNN) that uses two massive heatsinks to absorb and dissipate the waste heat generated by the PC’s internal components. The 500AF is a second generation case based on the original TNN 500A and offers many new features."