Intel and AMD processor consumes more power as compare to Sun's new UltraSPARC processor. It is new a technology that stay cool, save energy, and work smart. It consumes less power but at the same time provides the performance. According to Sun,

Networks grow larger, energy demands skyrocket, and natural resources dwindle. Sun is answering the need for sustainable computing with technologies that consume less power, generate less heat, take up less space, and reduce waste.

The UltraSPARC T1 processor with CoolThreads technology is the highest-throughput and most eco-responsible processor ever created. . Its 32 simultaneous processing threads, drawing about as much power as a light bulb, give you the best performance per watt of any processor available. Get more information about Sun's Commitment to Eco-Responsibility