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S1662-AT-001 http://www.tyan.com
3.2 Quick Reference for Jumpers
CPU Speed: J32, J27, J24, J28 and J25
CPU Speed
J32
J27
J24
J28
J25
J15
J14
150MHz
3-4
off
on
on
on
on
off
166MHz
1-2
off
on
on
on
off
on
180MHz
3-4
on
off
on
on
on
off
200MHz
1-2
on
off
on
on
off
on
Host Bus Speed/PCI Bus Speed: J32
Host Speed
PCI Speed
J32
J15
J14
60MHz
30MHz
3-4
on
off
66.67MHz
33.33MHz
1-2
off
on
CPU Clock Multiplier: J27, J24, J28 and J25
Multiplier
J27
J24
J28
J25
X2
on
on
on
on
X2.5
off
on
on
on
X3
on
off
on
on
X3.5
off
off
on
on
X4
on
on
off
on
CMOS Resest/Password Reset: J5(Default off)
If you forget your CMOS password or need to reset the
CMOS registers, just power off the system and close
jumper J5for five seconds. Then open jumper J5 and
power on the system. This will set the CMOS and password
back to the system default.
DRAM Voltage: J20, J21, J22, J23, J44, J45, J47,and J48.
Default is 5V(Some EDO memory is 3.3V)
Voltage J20 J21 J22 J23 J44 J45 J47 J48
3.3V on on on on off off off off
5V off off off off on on on on
Warning, damage to system can result if set incorrectly!
