American Megatrends MAN-758 manual Configure CPU Speed

Step 2 Configure CPU Speed

If using two CPUs with different speed ratings, set the motherboard jumpers to the lower CPU speed. J21 and J24 select the CPU speed. The drawings on the next screens show how J24 and J21 should look for each possible CPU speed:

CPU Speed	J21	J24
120MHz	OPEN	Short Pins 1-2,
		Short Pins 3-4
		Short Pins 5-6
		Short Pins 7-8
133MHz	Shorted	Short Pins 1-2,
		Short Pins 3-4
		Short Pins 5-6
		Short Pins 7-8
150MHz	OPEN	Short Pins 3-4
		Short Pins 5-6
		Short Pins 7-8
166MHz	Shorted	Short Pins3-4
		Short Pins 5-6
		Short Pins 7-8
180MHz	OPEN	Short Pins 1-2
		Short Pins 5-6
		Short Pins 7-8
200MHz	Open	Short Pins 1-2
		Short Pins 5-6
		Short Pins 7-8
210MHz	OPEN	Short Pin 5-6
		Short Pin 7-8
233MHz	Shorted	Short Pin 5-6
		Short Pin 7-8
240MHz	OPEN	Short Pins 1-2
		Short Pins 3-4
		Short Pins 7-8
266MHz	Shorted	Short Pins 1-2
		Short Pins 3-4
		Short Pins 7-8

Important

Please contact American Megatrends technical support at 770-246-8645 to support a CPU running at other speeds.

Cont’d

6MegaRUM PCI Motherboard User’s Guide