Some CPUs , such as the 1990 Intel i386SL , were designed to use minimum power to increase battery life of portable computers .
Some CPUs , such as the 1990 Intel i386SL , were were supported by dynamic power management features such as Intel SpeedStep and AMD PowerNow !
Some CPUs , such as the 1990 Intel i386SL , were designed to use minimum power to increase battery life of portable computers and were supported by dynamic power management features such as Intel SpeedStep and AMD PowerNow !