Depends on the type of motherboard and bios you have.
Overclocking the processor entails adjusting the front side bus speed up as the multiplier is locked on Intel chips.
But a warning, overclocking can lead to component failure, data loss, or just plain smoke.
Your current chip uses a multiplier of 9.5 times a front side bus of 66 mhz to achieve the 633 speed.
To overclock the processor you need to be able to adjust the front side bus upwards, best done in small increments and then test it out to make sure it will run stable at the new speed.
Not all motherboards support overclocking, if you don't have jumpers to set different fsb speeds or softmenu options in the bios to do it your out of luck.
You will need good cooling to keep things from overheating, also the agp and pci buses come into play as the speed on them is a direct ratio to the front side bus speed. Pci default speed is 33mhz and agp is 66 mhz. Good motherboards have options to take this into account and allow you to change the pci and agp ratio to stay as close to defaults as you can.
Overclocking the pci bus too much will result in device failure or data corruption, overclocking the agp bus to much can result in video overheating, lockups, and damaged video cards.
At your default fsb speed your pci ration is 1/2(pci running one half the speed of the front side bus or 33mhz), your agp ration is 1/1. To get to a 100mhz front side bus you would need to change the pci to 1/3 and the agp to 2/3.
But the overclock speed is a direct ratio of the multiplier of 9.5 times the front side bus speed. So if you could hit a 100 fsb you would be running at 950mhz.
Like I said, depends on motherboard, bios, and cooling. Vid cards also come into play as some don;t like to be overclocked very much.
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