6
Getting Started with the PowerLeap
™
PL-K6-III
PowerLeap
™
Installation Guide
SW1 Settings: Clock Multiplier, CPU Voltage,
System Compatibility, and CPU Overheating
Protection
This section shows the SW1 clock multiplier and core voltage settings for
supported AMD CPUs. It also lists settings for pin AL-1 compatibility and CPU
overheating protection.
SW1: Pins 1, 2, & 3 (Clock Multiplier)
The default clock multiplier setting for the PL-K6-III is 6x. (For a description of
calculating the bus clock speed, clock multiplier, and CPU speed for a variety of
CPUs, refer to “Technical Reference” later in this document.)
Pins 1, 2, & 3: Clock Multiplier for AMD K6-III
CLKMUL 6x 5.5x 5x 4.5x 4x 3.5x 3x 2.5x
SW1: Pin 1
ON
OFF
OFF ON ON OFF OFF ON
SW1: Pin 2
OFF
OFF ON ON OFF OFF ON ON
SW1: Pin 3
OFF
ON ON ON ON OFF OFF OFF
For systems with an external clock speed of less than 66MHz
(50MHz or 60MHz), there may be a slight performance
sacrifice for your new CPU. For example, changing to a
K6-III 400 from a Pentium-75 will result in a system upgrade
speed of 300MHz (not 400MHz). In this case, you can get
improved performance by adjusting the external clock speed
to 66MHz.
