TAG MIL-BOOK 100 - Manual (Page 82)

Setup Configuration Utility 5-7
Geyserville Support
Enables or disables the Geyserville feature of the CPU. The
Geyserville feature helps conserve battery life by decreasing the
CPU’s running speed under certain conditions while still maintaining
a high performance. If this item is enabled, the CPU will
automatically change its speed whenever necessary based on the
“Power Scheme” setting in Windows’s Control Panel. If this item is
disabled, the CPU will always run in the lowest speed (600 MHz).