The researchers, who are from the US Department of Energy's Lawrence Berkeley National Laboratory (Berkeley Lab), have proposed the use of a supercomputer with low-power embedded microprocessors, an approach that would overcome limitations posed by today's conventional supercomputers.

For this purpose, Berkeley Lab has signed a collaboration agreement with Tensilica, Inc. to explore the use of its Xtensa processor cores as the basic building blocks in a massively parallel system design.

Tensilica's Xtensa processor is about 400 times more efficient in floating point operations per watt than the conventional server processor chip shown here.

The researchers have presented a radical alternative that would cost less to build and require less electricity to operate.

According to them, a supercomputer using about 20 million embedded microprocessors would deliver the results and cost 75 million dollars to construct.

This "climate computer" would consume less than 4 megawatts of power and achieve a peak performance of 200 petaflops.

According to Michael Wehner and Lenny Oliker of Berkeley Lab's Computational Research Division, and John Shalf of the National Energy Research Scientific Computing Center (NERSC), the new class of supercomputers would be more efficient for modeling climate conditions and understanding climate change.

Using the embedded microprocessor technology used in cell phones, iPods, toaster ovens and most other modern day electronic conveniences, the researchers propose designing these energy-efficient high-performance scientific computer systems for running these models and improving climate predictions.