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MS-6119
1. CPU Core Speed Derivation Procedure
The DIP Switch SW1 (1,2,3 and 4) is used to set the Core/Bus (Fraction)
ratio of the CPU. The actual core speed of the CPU is the Host Clock
Frequency multiplied by the Core/Bus ratio.
The SW1 is a DIP switch located next to the IDE and DIMM sockets.
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CPU TYPE
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SW1
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Core/Bus Ratio
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1
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2
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3
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4
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2.5
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ON
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OFF
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ON
|
ON
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3
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ON
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ON
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OFF
|
ON
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3.5
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ON
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OFF
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OFF
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ON
|
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4
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ON
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ON
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ON
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OFF
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4.5
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ON
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OFF
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ON
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OFF
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5
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ON
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ON
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OFF
|
OFF
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5.5
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ON
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OFF
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OFF
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OFF
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6
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OFF
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ON
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ON
|
ON
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6.5
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OFF
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OFF
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ON
|
ON
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7
|
OFF
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ON
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OFF
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ON
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7.5
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OFF
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OFF
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OFF
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ON
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8
|
OFF
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ON
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ON
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OFF
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NOTE: a. The CPU Bus Frequency is set at 66MHz or 100MHz
by CPU default.
b. If the mainboard support CPU Plug & Play, disregard
this table and go directly to BIOS Special Features Setup to
set the CPU speed.
2. The PCI Bus Clock is fixed at 33MHz
3. To adjust the speed of the CPU, yo must know the specification
of your CPU (always ask the vendor for CPU specification)
a: 66MHz CPU Bus Frequency
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CPU TYPE
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SW1
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1
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2
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3
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4
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200 MHz
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ON
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ON
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OFF
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ON
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233 MHz
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ON
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OFF
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OFF
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ON
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266MHz
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ON
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ON
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ON
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OFF
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300MHz
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ON
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OFF
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ON
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OFF
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333MHz
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ON
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ON
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OFF
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OFF
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b: 100MHz CPU Bus Frequency
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CPU TYPE
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SW1
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1
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2
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3
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4
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350MHz
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ON
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OFF
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OFF
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ON
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400MHz
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ON
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ON
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ON
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OFF
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450MHz
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ON
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OFF
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ON
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OFF
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