Cpu Clock Frequency Selector: Jp1 - Acorp 4845GVQ Manual

Chapter 1

1.7.14 CPU Clock Frequency Selector: JP1

JP1 is designed to detect the CPU Frequency on board. Setting
JP1 to 1-2 closed (default) will detect the CPU clock automatically
which is providing the Front Side Bus 400/533MHz. While setting
to 2-3 closed, the CPU clock will support only 100MHz.
NOTE:
Intel usually provides CPUs with locked CPU frequency so as to
forbid CPU overclock. We therefore don't recommend users to do
CPU overclocking on Intel CPU because you may risk CPU damage.
JP1 Setting
CPU(MHz)
1
1-2 closed
Auto
(default)
Intel
845GV
VIA
VT610 5
1-23
Motherboard 4845GVQ
1
2-3 closed
100 MHz
VIA
Intel
VT6306
ICH4