This application is a continuation of U.S. application Ser. No.
09/282,141 filed Mar. 31, 1999 now U.S. Pat. No. 7,472,215.
FIELD OF INVENTION The present invention is directed to portable
computers having at least two power modes of operation. In
particular, an embodiment of the present invention is directed
to a portable computer having a high and low power mode of
operation and more particularly in association with a docking
station wherein the portable computer operates in a lower power
mode when not engaged in the docking station and in a high power
mode when engaged in the docking station which has cooling
systems to cool the high power mode of operation. The power
consumption of laptop computers, especially the power of CPUs
used in laptop computers is increasing. For instance, the total
power of a laptop computer is usually around 10 watts and now it
is becoming 20 to 30 W. The CPU power has been increased from 2
to 8 W and in the future could be in the 15 W range and higher.
Most of this power will e