Athlon XP 2100+ Asus A7A266 Speed error

Hello. I just installed an AMD Athlon XP 2100+ in my Asus A7A266 motherboard and when I load up windows XP pro it registers the speed as 1.3 Ghz. When I go into my bios (Which is the latest version 1011) and manually change the cpu speed to 1.7 Ghz, the computer will not boot up. What am I doing wrong? Please help and thank you in advance for your replies.
BTW, when I reboot and the computer is doing its memory post, it does recognize it as an Athlon XP 2100+ but running at only 1300 Mhz.
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More about athlon 2100 asus a7a266 speed error
  1. you mean set the bus speed to 133 correct?
    Lack of booting at normal speed could be due to many things.

    Lack of power or poor PSU,
    Poor voltage regulation on the motherboard,
    Bad motherboard.
    Ram timings too hard/ram not running properly at 133mhz.
    etc

    try resetting your bios, then setting the memory timings to be most conservative then change the jumper to 133 on the motherboard.


    <b><i>The Very Hungry Caterpillar</i> - George W. Bush's favorite childhood book.
    Note: This book was first published a year after Mr Bush graduated from College.</b>
  2. FSB@133 With A 13 multiplier/ratio


    Details, Details, Its all in the Details, If you need help, Don't leave out the Details.
  3. also make sure you choose 'auto' as the multiplier, not '13'. Occasionally that can cauze problems.

    P.S. What exactly happens when you choose 133x13 and reboot? How far do you get?

    <b><i>The Very Hungry Caterpillar</i> - George W. Bush's favorite childhood book.
    Note: This book was first published a year after Mr Bush graduated from College.</b>
  4. "P.S. What exactly happens when you choose 133x13 and reboot? How far do you get?"

    It gets nowhere. Usually, the first thing I see is my Video card bios info and then the memory post. But when I set it to these settings and reboot, it's just black screen from there.
  5. It won't let me choose a multiplier. Its grayed out at 13x. I can set the cpu speed to either 1300 Mhz or 1730 Mhz) and the bus speed/multilplier can be changed to a whole bunch of different settings. I tried changing this to 133/33 and it hung just like it does when I change the cpu speed. The only thing that works is when it is set to 1300 Mhz.

    There is a newer bios version available, but it is a beta version. Would you recommend using it?
  6. no, stick with the latest one for now.
    set your ram to most conservative settings, see if that lets you boot.

    <b><i>The Very Hungry Caterpillar</i> - George W. Bush's favorite childhood book.
    Note: This book was first published a year after Mr Bush graduated from College.</b>
  7. What rating is your PSU? I had exactly the same problem, and replacing my crappy generic 300W PSU with a nice enermax 430W one seemed to do the trick.

    ---
    :smile: :tongue: :smile:
  8. Well... I've found my answer. I called Asus tech support today and found out that my motherboard does not accept Athlon XP chips. Something to do with the voltage. Apparantly the newer versions of the A7A266 with a revision number of 1.10 or higher do accept the XP chips. I have version 1.04. So basically I'm sh*t out of luck.

    I don't mind really because I'll just sell it now that I've placed an order for an Asus A7N8X. Yeah baby!
  9. windows doenst see AMD processors at there real AMD rated speed only at the strait clock frequency fsb*multipler so set your fsb back to what it was before prob 133 or however you got it to 1.7 the reason it did not boot at that speed is b/c you overclocked it too much if you are stuck and it wont boot you can ussually manually override anything you changed in bios look in the manual for the mobo
    hope this helps i got almost the same pc so IM me or email me if this doesnt
    IM: bradleyboldt
    email: brad@wideopenwest.com
    peace
  10. What r u talking about ???

    I Have 2 Athlon XP systems......

    My 1600+ system in windows shows
    AMD Athlon XP 1600+(tm)
    1.40GHz
    512MB of Ram

    My 1800+ system at 2000+ in windows shows
    AMD Athlon XP 1800+(tm)
    1.67GHz
    256MB of Ram

    so there it shows the exact CPU Models of both...and the speed in MHz of both....

    <A HREF="http://www.anandtech.com/mysystemrig.html?id=13597" target="_new">-MeTaL RoCkEr</A>
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