This category of compact PCs are designed without cooling fans and they are totally dust-free. These range of systems uses the chassis as a heat sink to dissipate internal heat and provide quiet noise free operation. Powered by Intel® Atom™, Core™ 2 Duo, and Core i7/i5 processors, these high-performance, rich I/O systems are suitable for space-critical applications and environment where dust or debris is a major concern.