Socket 5: Tuning Old PC Systems

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Technology: Processor Bus Clock, Multiplier And CPU Core Voltage

We restrict ourselves in the following description to motherboards with Socket 5, which are equipped with an Intel 430FX chipset. As the CPU clock (processor core clock) is derived from the processor bus clock and the clock multiplier, the highest possible clock rate should be chosen in principle for the upgrade. Otherwise such a high clock frequency is not achieved and performance is wasted. Here is an example to illustrate this: The Asus P55TP4XE that we tested offers a maximum processor bus clock of 66 MHz. As a rule, the board supports a maximum clock multiplier of 3.

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Socket 5 - Multiplier and Clock	CPU clock
3,0 x 66 MHz	200 MHz
2,5 x 66 MHz	166 MHz (Pentium 166)
2,0 x 66 MHz	133 MHz (Pentium 133)
1,5 x 66 MHz	100 MHz (Pentium 100)
1,5 x 60 MHz	90 MHz (Pentium 90)
1,5 x 50 MHz	75 MHz (Pentium 75)
Upgrade Adapter - Multiplier and Clock	CPU clock
6,0 x 66 MHz	400 MHz (AMD K6-2/400)
5,5 x 66 MHz	366 MHz (AMD K6-2/366)
5,0 x 66 MHz	333 MHz (AMD K6-2/333)
4,5 x 66 MHz	300 MHz (AMD K6-2/300)