XP Barton 2900 - Locked? Won't overclock?

I’ve installed an new AMD Barton XP 2900 (made for OEM use) which is recognized OK and runs very cool at 2ghz as per CPUID’s readings.   It  is default set at 200 FSB at 10X.   I would like to tweak it a bit but every time I reset the multiplier to say, 10.5 or 11, it seems to be reset at the bios when exiting the bios.  A red screen comes up telling me to not turnoff the machine – the bios is functioning.  CPUID still reads it at 2000, but inside the bios still says it has been reset to 10.5  or 11.0 as I set it.   The Mboard is Epox  8RDA6+PRO which I successfully used to bump up a different  processor.  Does this mean this processor is “locked”?
Thanks,   Lloyd
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Irwin SantosComputer Integration SpecialistCommented:
Either one of 2 things you need to consider..

Updated the motherboard BIOS?

the other is

you may not be able to overclock the processor.
Irwin SantosComputer Integration SpecialistCommented:

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Only the mobile Barton is unlocked from the manufacturer, as far as I know.  All other AthlonXP's have to have the bridges on the cpu joined.  You use the FSB adjustment to overclock if the multiplier can't be changed.
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Will SzymkowskiSenior Solution ArchitectCommented:
I have overclocked my computer at home and it is best if you overclock your FSB not the Multiplier. If you can you should overclock by increments of 1 MHz and test and retest to make sure everything is stable. Remember its better to have a stable computer rather then a computer might be a bit faster but has heat and unstablility issues.

If you can actaully modify the BIOS and your not getting results then update the BIOS.

Hope this helps
Nolan MasonIT ProfessionalCommented:
You probably need to unlock your CPU by connected the L1 bridges, or possibly even the L5 bridges to convert it to the configuration of a mobile CPU.  Here are some good resources on how this is done:


desertstudioAuthor Commented:
Thanks, good info,  It will take a few days for me to get back to the computer to try a bios update and increasing theFSB.  Just to double check - if I increase the FSB, that affects the memory as well, yes?  I'll let you know.
Yes, increasing the FSB affects memory and the AGP and PCI buses, so make sure the memory is fast enough to handle it, and lock the AGP (if you have that slot) to 66MHz and PCI to 33MHz if the option is there to do so.  Otherwise, you may need to use a divider that expresses PCI/AGP/FSB as a ratio, like 1/2/6, and then the FSB can only be changed by increments of 33.
desertstudioAuthor Commented:
Thanks again, I think Ive got it.
Will SzymkowskiSenior Solution ArchitectCommented:
Just for future reference you should only OC your computer by a maximum of 10%. Also mentioned above that you should by a Retail CPU/heatsink, this would be the best option but you will void the warrenty if you overclock it even by 1 MHz. If you are serious about OC your CPU I would definitely look into getting an aftermarket Heatsink/fan. The heatsink that comes with the retail processor cannot handel much more then what the standard is set to. A good aftermarket heatsink would be Zalman. They specialize in OC hardware. If you decided to get aftermarket fan you have to make sure that it is compatible with your motherboard, Zalman website has everything you'll need to make sure it will be compatable. Here is the site.


Hope this helps

Will SzymkowskiSenior Solution ArchitectCommented:
The Zalman website even has Flash movies to show you the proper way to install it onto your motherboard.
Nolan MasonIT ProfessionalCommented:
Don't forget to close out the question.

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