VIA LongHaul is a CPU speed throttling and power saving technology developed by VIA Technologies. By executing specialized instructions, software can exercise fine control on the bus-to-core frequency ratio and CPU core voltage. When the system first boots, the ratio and voltage are set to hardware defaults. While the operating system runs, a CPU driver controls the throttling according to how much load is put on the CPU.

Processors supporting LongHaul

• Cyrix III - some models http://www.cpuscorecard.com/cpuprices/vc3.htm

• VIA C3

• VIA C7 (PowerSaver)

• VIA Nano (PowerSaver)

External links

• VIA C3 in EBGA Datasheet

• Tom's Computer Dictionary - LongHaul entry