SOYO SY-5EH5 User's Manual & Technical Reference page 26

Hardware Setup
Step 5. Set JP7,JP9,JP10 for SDRAM frequency
JP7 is used to indicate the frequency of the CPU bus clock to the ETEQ
chipset.
JP9 and JP10 are used to determine that the SDRAM is running at the
frequency of the CPU bus clock or the AGP clock.
CPU BUS AGP BUS
Clock Clock
66MHz 66MHz
75MHz 75MHz
83MHz 55MHz
95MHz 63.4MHz
97MHz 63.4MHz
100MHz 66MHz
Note: Use 8ns or faster SDRAM modules (PC100 compliant) when
SDRAM is set to run at the frequency of 95/100 MHz.
JP10 JP7
1-2 2-3
1-2 2-3
2-3 1-2
1-2 1-2
2-3 1-2
1-2 1-2
2-3 1-2
1-2 1-2
2-3 1-2
1-2 1-2
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SY-5EHM/5EH5 V1.3
JP9 SDRAM Clock
2-3 66MHz
2-3 75MHz
1-2 55MHz
2-3 83MHz
1-2 63.4MHz
2-3 95MHz
1-2 63.4MHz
2-3 95MHz
1-2 66MHz
2-3 100MHz