| Fortunately, the motherboard will usually have printed instructions on the board about which jumpers to maneuver to get the desired results. |
 
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| If you can't make it out, the first picture is telling us that "Jumper C" determines the clock frequency of the processor to either 50, 60, or 66 by placing the jumpers on either 1-2, 2-3, 4-5, or 5-6. The second picture stats that "Jumper D" will give a multiplier setting of either 1.5x, 2.0x, 2.5x, or 3.0x by placing the jumpers on either 1-2, 2-3, 4-5, or 5-6. Well what does that mean? It means that you will use a "jumper" (a small piece of plastic with a piece of metal on the inside that will connect two pins to each other) to connect pins 2-3 and 5-6 on jumper C location on the motherboard to cause the CPU frequency to be 50. Note the following pictures, Jumper location C is marked by the white line that says "C" and it labels some of the pins, the blue plastic piece is what is used to connect the pins. |
 
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If the settings aren't printed on the board you can either look in your motherboard manual or just experiment placing different jumpers on different settings and seeing what happens. Actually that last one is a REALLY bad idea, and it's probable that you could fry your board, so only try it with equipment your willing to lose. The layout of the board looks like this: (The 0's represents the pins) 4 5 6 Jumper "C" Clock Frequency Jumper "D" Bus Frequency Multiplier Can you tell which picture is running at the faster clock speed? Picture 1: Picture 2: In Picture C the CPU clock frequency is set to 50 with a multiplier of 3.0x (3.0 x 50 = 150). In Picture D the CPU clock frequency is set to 66 with a multiplier of 3.0x (3.0 x 66 = 198). Next: How do we change the jumpers? |