Jp17, Jp18: Bus Ratio Select - SOLTEK SL-52D2 User Manual

JP17, JP18: Bus Ratio Select

Set these jumpers according to your CPU clock.
Ratio
(default)
Notice that the color of the cap is RED.
12
1.5X
2X
2.5X
3X
JP18
JP17
JP17
+
–
JP18