It's probably your cpu running at 100Mhz. e.g. 18 X 100Mhz = 1800Mhz or 1.8Ghz. About what you have got.
It needs to run at 133Mhz. e.g. 18 X 133 = 2.394Ghz.
We would need the make and model of motherboard, to help.
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