Gigabyte 6ZMM manual Cmos RTC & ISA CFG Cmos Sram

Hardware Installation

the DIP SWITCH (SW1) selection to set up the CPU speed for 233 - 650MHz processor. The CPU speed must match with the frequency RATIO. It will cause system hanging up if the frequency RATIO is higher than CPU's.

	DIP SWITCH (SW)			FREQ.	EXT.CLK.	INT.CLK.
						CPU Type
1	2	3	4	RATIO	MHz
						MHz

OFF	OFF	ON	ON	3.5	66	233	Pentium® II 233 MHz
							(Celeron 233MHz)
ON	ON	OFF	ON	4	66	266	Pentium® II 266 MHz
							(Celeron 266MHz)
OFF	ON	OFF	ON	4.5	66	300	Pentium® II 300 MHz
							(Celeron 300MHz)
ON	OFF	OFF	ON	5	66	333	Pentium® II 333 MHz
							(Celeron 333MHz)
OFF	OFF	OFF	ON	5.5	66	366	Pentium® II 366 MHz
							(Celeron 366MHz)
ON	ON	ON	OFF	6	66	400	Pentium® II 400 MHz
							(Celeron 400MHz)
OFF	ON	ON	OFF	6.5	66	433	Pentium® II 433 MHz
							(Celeron 433MHz)
OFF	OFF	ON	ON	3.5	100	350	Pentium® II 350 MHz
ON	ON	OFF	ON	4	100	400	Pentium® II 400 MHz
OFF	ON	OFF	ON	4.5	100	450	Pentium® III450 MHz
ON	OFF	OFF	ON	5	100	500	Pentium® III500 MHz
OFF	OFF	OFF	ON	5.5	100	550	Pentium® III 550 MHz
ON	ON	ON	OFF	6	100	600	Pentium® III 600 MHz
OFF	ON	ON	OFF	6.5	100	650	Pentium® III 650 MHz

MThe CPU is a sensitive electric component and it can be easily damaged by static electricity, so users must keep it away from

metal surface when the CPU is installed onto mainboard.

M We don’ t recommend you to setup your system speed to 75, 83, 112, or 133MHz because these frequencies are not the standard specifications for CPU, Chipset and most of the peripherals. Whether your system can run under 75, 83, 112 or 133MHz properly will depend on your hardware configurations: CPU, SDRAM, Cards, etc.

3.6. CMOS RTC & ISA CFG CMOS SRAM

The mainboard contains RTC & CMOS SRAM on board. They have a power

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