Tyan Computer TYAN S1668 user manual Jumper Settings CPU Speed J27, J21, J22, J23, and J24

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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