TYAN S1668 Dual Pentium Pro ATX 440FX PCI-ISA System Board User's Manual

8S1668-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!