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why does my fsb fluctuate?

S

stealthy123

2[H]4U
Joined
Feb 4, 2005
Messages
3,149
call it baseclock or whatever, why does it wiggle around, pretty close to what I set it at but never ever is it static?

Am on my Llano machine right now, and the cpu is fluctuating between 3497.46 and 3500.29, why does it move? What is the process going on that makes it dance?

using asrock extreme tuning utility to get the readings.

I don't care that it moves, just want to know the processes involved.
 
I'm not sure but all electronic devices get their ability to work in relation to time by using a quartz crystal/oscillator. If the quartz crystal they used has a "loose" tolerance then 100 PPM (parts per million) in a processor with a 100 MHz FSB is going to be 99.9 MHz. Multiply that by 30, and you have a 3 MHz fluctuation in clock at 3 GHz.

Again I'm not 100% on this but this is probably it.
 
Either a little bit of clock drift, or it could be caused by spread spectrum being enabled. But mostly just clock drift/error.
 
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