Before I return a CPU to supplier as duff could someone advise me. If I try it on a different PC without first going into bios and resetting the processor speed will it be recognised on bootup or will it fail to do anything? What I'm going to try is to fit a 1.3GHz duron in place of an xp2000+
I THINK you may fry the cpu or get no bootup at all.
The duron is running at 100Mhz. (Not one of these cut down athlon 133Mhz jobs is it?)
Your xp2000+ is most certainly running at 133Mhz.
Now most of the time the fsb is controlled by a jumper on the board, while the multiplier is auto detect in the bios ( some still have manual switches on the board) So if you drop in the duron without doing any changes and it sends 133Mhz through the chip, it would probably fry. That's if it would attempt to boot.
Look at the motherboard manual to see if there is a jumper for the fsb of the machine. If there is, then drop it to 100Mhz and then try the duron.