Intel AP440FX Microprocessor Configuration J4L2, Motherboard Configuration J4L2, J1J1

AP440FX Motherboard Technical Product Specification

1.13.1Microprocessor Configuration (J4L2)

These allow the motherboard to be switched between different speeds of the Pentium Pro processor. These jumpers also affect the PCI and ISA clock speeds as shown in Table 23.

Table 23. Microprocessor/System Speed Settings

J4L2-A	J4L2-B	J4L2-C
DOWN	DOWN	DOWN
DOWN	DOWN	UP
DOWN	UP	DOWN
DOWN	UP	UP
UP	DOWN	DOWN
UP	DOWN	UP
UP	UP	DOWN
UP	UP	UP

		Host Bus	PCI Bus	ISA Bus
Microprocessor	Microprocessor	Freq.	Freq.	Freq.
Clock Multiplier	Freq. (MHz)	(MHz)	(MHz)	(MHz)
2.5	150	60	30	7.5
2.5	166	66	33	8.33
	reserved
	reserved
	reserved
	reserved
3	180	60	30	7.5
3	200	66	33	8.33

1.13.2Motherboard Configuration (J4L2, J1J1)

The jumpers for sections D, E, F, G, and H of J4L2 allow the selection of various motherboard features. A second jumper block (J1J1) allows selection of a riser board with either two or three PCI board connectors. A third jumper (J8A2) is used to provide 3.5 V for processors that require that voltage.

CAUTION

Do not install a jumper on the J8A2 header if you are using a processor that does not require 3.5V. The increased voltage could damage the processor.

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