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FSB speed

By Shadow_43701 ·
I have an athlonxp 1800+ that runs at 333mhz fsb with 2 256 pc2700 ddr ram chips in it. My problem is that I don't know if the system really is running at the 333 mhz speed. The Bios says that the cpu clock is 133 mhz. Is that the corrrect setting?

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Does not sound right

by TheChas In reply to FSB speed

You are correct in your thinking that 133MHz does not sound 'right' for a 333MHz FSB.
133MHz can be correct for a 266MHz FSB CPU.
166MHz would be my expectation for a 333MHz FSB.

The question here is what motherboard?

Every Socket A motherboard that I have used has a different method of setting the bus and multiplier values.
If the motherboard uses a combination of FSB and the PCI clock to set the CPU FSB, then you may be okay.

Does the motherboard support a 333MHz FSB?
Do you need faster RAM for a 333MHz FSB?
Do you actually have the 333MHz FSB Athlon or is it a 266MHz FSB chip?
(You will need to either verify the part number on the CPU, or run a CPU ID utility.)

This is a link to AMD's utility page:


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