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Tyan S1668 User Manual

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S1668-ATX-001 http://www.tyan.com
3.2 Jumper Settings:
CPU Speed: J27, J21, J22, J23, and J24
CPU Speed
J27
J21
J22
J23
J24
J11
J12
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: J27
Host Speed
PCI Speed
J27
J11
J12
60MHz
30MHz
3-4
on
off
66.67MHz
33.33MHz
1-2
off
on
CPU Clock Multiplier: J21, J22, J23 and J24
Multiplier
J21
J22
J23
J24
X2
off
off
off
off
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: J41(Default off)
If you forget your CMOS password or need to reset the
CMOS registers, just power off the system and close
jumper J41for five seconds. Then open jumper J41 and
power on the system. This will set the CMOS and password
back to the system default.
DRAM Voltage: J2, J3, J14, J15, J4, J5, J16 and J17(Default 5V)
         (Some EDO memory is 3.3V)
      Voltage    J2    J3    J14    J15    J4    J5    J16    J17
      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!
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