IBM plans to <A HREF="http://www.cio.com/blog_view.html?CID=25638">crank up the speed</A> on its Power6 server chip to 5.0GHz, far higher than competing processors from Intel and Sun Microsystems. Despite its high frequency, the chip will avoid overheating through its small, 65-nanometer process geometry, high-bandwidth buses running as fast as 75GB per second, and voltage thresholds as low as 0.8 volts, IBM said.