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SY-5EMA+ Quick Start Guide
8
Installation
Step 3. Set SW1 for CPU Frequency
The DIP switch SW1 enable you to assign the Multiplier and Bus Clock, as shown in the
following table:
Frequency Setting:
SW1
Processor Multiplier
CPU
Bus
Clock
JP10 JP8 JP9
1 2 3 4 5 6
AMD K5 PR100 1.5x 66MHz 1-2 2-3 2-3
off off off off off off
AMD K5 PR133 2.0x 66MHz 1-2 2-3 2-3
on off off off off off
AMD K5 PR166 2.5x 66MHz 1-2 2-3 2-3
on on off off off off
AMD K6 166 2.5x 66MHz 1-2 2-3 2-3
on on off off off off
AMD K6 200 3x 66MHz 1-2 2-3 2-3
off on off off off off
AMD K6 233 3.5x 66MHz 1-2 2-3 2-3
off off off off off off
AMD K6 266 4.0x 66MHz 1-2 2-3 2-3
on off on off off off
AMD K6 300 4.5x 66MHz 1-2 2-3 2-3
on on on off off off
AMD K6-2 266 4.0x 66MHz 1-2 2-3 2-3
on off on off off off
AMD K6-2 300 3x 100MHz 1-2 1-2 2-3
off on off off off on
AMD K6-2 333 3.5x 95MHz 1-2 1-2 2-3
off off off on off on
AMD K6-2 350 3.5x 100MHz 1-2 1-2 2-3
off off off off off on
Cyrix 6x86 MX PR 166+
2.0x 66MHz 1-2 2-3 2-3
on off off off off off
Cyrix 6x86 PR MX 200+
2.0x 75MHz 1-2 2-3 2-3
on off off off on off
Cyrix 6x86 MX PR 166
2.0x 66MHz 1-2 2-3 2-3
on off off off off off
2.5x 66MHz 1-2 2-3 2-3
on on off off off off
Cyrix 6x86 MX PR 200
2.0x 75MHz 1-2 2-3 2-3
on off off off on off
Cyrix 6x86 MX PR 233
2.5x 75MHz 1-2 2-3 2-3
on on off off on off
Cyrix 6x86 MX PR 266
2.5x 83MHz 1-2 1-2 2-3
on on off on on off
3.5x 66MHz 1-2 2-3 2-3
off off off off off off
Cyrix MII 300
3x 75MHz 1-2 2-3 2-3
off on off off on off
4.0x 66MHz 1-2 2-3 2-3
on off on off off off
3.5x 75MHz 1-2 2-3 2-3
off off off off on off
3x 83MHz 1-2 1-2 2-3
off on off on on off
Cyrix MII 333
2.5x 100MHz 1-2 1-2 2-3
on on off off off on
Cyrix MII 350 3x 100MHz 1-2 1-2 2-3
off on off off off on
P54C P100 1.5x 66MHz 1-2 2-3 2-3
off off off off off off
P54C P133 2.0x 66MHz 1-2 2-3 2-3
on off off off off off
P54C/P55C P166 2.5x 66MHz 1-2 2-3 2-3
on on off off off off
P54C/P55C P200 3x 66MHz 1-2 2-3 2-3
off on off off off off
P55C P233 3.5x 66MHz 1-2 2-3 2-3
off off off off off off
This main board supports various CPU multiplier and host bus frequency settings.
Please select the proper frequency setting based on specifications of the CPU you have
purchased. System stability or components damage, in case of over-specification setting, is
not guaranteed.